A structurally preserved, Lower Pennsylvanian flora from the New Castle Coal Bed of Alabama /

Plant microfossils of the Croweburg coal /
by: Wilson, L. R. (Leonard Richard), 1906-1998, et al.
Published: (1956)

Lower Pennsylvanian species of mariopteris, eremopteris, diplothmema, and aneimites from the Appalachian region.
by: White, David, 1862-1935
Published: (1943)

Palynology of selected coal beds in the proposed Pennsylvanian System stratotype in West Virginia /
by: Kosanke, Robert M. (Robert Max)
Published: (1985)

Contributions to Pennsylvanian paleobotany Mazocarpon oedipternum : sp. nov. and Sigillarian relationships /
by: Schopf, James M. (James Morton), 1911-1978
Published: (1941)

Palynological studies of Middle Pennsylvanian coal beds of the proposed Pennsylvania System stratotype in West Virginia /
by: Kosanke, Robert M. (Robert Max)
Published: (1988)

Additions to the flora of the Spotted Ridge Formation in central Oregon /
by: Mamay, Sergius H., 1920-, et al.
Published: (1956)

Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois /
by: Pfefferkorn, Hermann W.
Published: (1976)

Two new plant genera of Pennsylvanian age from Kansas coal balls.
by: Mamay, Sergius H., 1920-
Published: (1954)

The fossil flora of the Drywood Formation southwestern Missouri /
by: Basson, Philip W.
Published: (1969)

Fossil plants of Indiana.
by: Canright, James E. (James Edward), 1920-
Published: (1959)

Lower Pennsylvanian species of mariopteris, eremopteris, diplothmema, and aneimites from the Appalachian region /
by: White, David, 1862-1935, et al.
Published: (1943)

Environments of deposition : coal balls, cuticular shale, and gray-shale floras in Fountain and Parke counties, Indiana /
by: Eggert, Donald L.
Published: (1982)

Archaeolithophyllum, an abundant calcareous alga in limestones of the Lansing Group (Pennsylvanian) Southeastern Kansas /
by: Wray, John Lee, 1925-
Published: (1964)

Sporomorphs from the Jackson Group (upper Eocene) and adjacent strata of Mississippi and western Alabama /
by: Frederiksen, Norman O.
Published: (1980)

Plantas del Pensilvanico de la region de Tehuacan, Puebla.
by: Silva Pineda, Alicia
Published: (1970)

The anatomy and affinities of Medullosa noei Steidtmann, and associated foliage, roots, and seeds /
by: Steidtmann, Waldo Edward, 1896-
Published: (1944)

Archaeosperma arnoldii, a cupulate seed from the Upper Devonian of North America /
by: Pettitt, John Michael
Published: (1968)

Palynological studies of Middle Pennsylvanian coal beds of the proposed Pennsylvania System stratotype in West Virginia /
by: Kosanke, Robert M. (Robert Max)
Published: (1988)

Invertebrate body fossils and trace fossils from the Lower Pennsylvanian of northern Alabama /
by: Gibson, Michael A.
Published: (1989)

Palynology of selected coal beds in the proposed Pennsylvanian System stratotype in West Virginia /
by: Kosanke, Robert M. (Robert Max)
Published: (1984)

Palynology of part of the Paradox and Honaker Trail formations, Paradox Basin, Utah.
by: Kosanke, Robert M. (Robert Max)
Published: (1995)

The shoot apex of Callistophyton poroxyloides.
by: Delevoryas, Theodore, 1929-
Published: (1956)

Palynological studies of the coals of the Princess reserve district in northeastern Kentucky /
by: Kosanke, Robert M. (Robert Max)
Published: (1973)

Spores in strata of late Pennsylvanian cyclothems in the Illinois Basin.
by: Peppers, Russel A. (Russel Allen), 1932-
Published: (1964)

Supplement to the Lower Tertiary floras of Southern England /
by: Chandler, Marjorie Elizabeth Jane
Published: (1978)

Spores from the Herrin (no.6) coal bed in Illinois /
by: Schopf, James M. (James Morton), 1911-1978

Pennsylvanian stratigraphy of the Warrior Basin, Alabama /
by: Metzger, William J.
Published: (1965)

Coal : its formation and composition.
by: Francis, Wilfrid, 1899-
Published: (1954)

Lepidodendron johnsonii, sp. nov., from the lower Pennsylvanian of central Colorado /
by: Arnold, Chester A. (Chester Arthur), 1901-1977
Published: (1940)

Additions to the flora of the Spotted Ridge Formation in central Oregon /
by: Mamay, Sergius H., 1920-, et al.
Published: (1956)

Pennsylvanian flora of Northern Illinois /
by: Noé, A. C. (Adolf Carl), 1873-1939
Published: (1925)

A preliminary study of the fossil flora of the Michigan coal basin /
by: Arnold, Chester A. (Chester Arthur), 1901-1977
Published: (1934)

Palynology and its relationship to climatically induced depositional cycles in the Middle Pennsylvanian (Desmoinesian) Paradox Formation of southeastern Utah.
by: Rueger, Bruce F.
Published: (1996)

Eocene flora of western America /
Published: (1937)

Pliocene floras of California and Oregon /
by: Chaney, Ralph W. (Ralph Works), 1890-1971
Published: (1944)

Vitrinite reflectance of Alabama's bituminous coal /
by: Winston, Richard B.
Published: (1990)