Smithsonian Institution. Office of the Secretary & Ewing, H. E. (1928). Legs and leg-bearing segments of some primitive arthropod groups, with notes on leg-segmentation in Arachnida. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary and H. E. Ewing. Legs and Leg-bearing Segments of Some Primitive Arthropod Groups, with Notes on Leg-segmentation in Arachnida. Washington, D.C.: [publisher not identified], 1928.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary and H. E. Ewing. Legs and Leg-bearing Segments of Some Primitive Arthropod Groups, with Notes on Leg-segmentation in Arachnida. [publisher not identified], 1928.
Warning: These citations may not always be 100% accurate.