The nature of shield abnormalities in the turtle shell / [by] Rainer Zangerl -- and Ralph G. Johnson --.

v.10:no.29(1957)

New interatheriines (Interatheriidae, notoungulata) from the Paleogene of central Chile and southern Argentina / Ralph B. Hitz -- [et al.].

n.s. no.42(2000)

Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: the morphology and affinities of Tullimonstrum / Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. --

v.12:no.8(1969)

New fossil polychaete from Essex, Illinois / Ida Thompson -- and Ralph G. Johnson --.

v.33:no.25(1977)

The Tanala, a hill tribe of Madagascar, by Ralph Linton -- Marshall Field expedition to Madagascar, 1926; 35 text-figures. Berthold Laufer -- editor.

v.22(1933)

Tobacco and its use in Africa / by Berthold Laufer, Wilfrid D. Hambly, and Ralph Linton; 6 plates in photogravure.

no.29(1930)

The Annelida Polychaeta / by Ralph V. Chamberlin.

v.48 (1919) text