Groot, J. J. (1955). Sedimentary petrology of the Cretaceous sediments of northern Delaware in relation to paleogeographic problems. [publisher not identified].
Chicago Style (17th ed.) CitationGroot, Johan J. Sedimentary Petrology of the Cretaceous Sediments of Northern Delaware in Relation to Paleogeographic Problems. Newark: [publisher not identified], 1955.
MLA (9th ed.) CitationGroot, Johan J. Sedimentary Petrology of the Cretaceous Sediments of Northern Delaware in Relation to Paleogeographic Problems. [publisher not identified], 1955.
Warning: These citations may not always be 100% accurate.