Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1959)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1985)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1985)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1985)

Bulletins of American paleontology - Columbia University. College of Pharmacy. (Paleontological Research Institution [etc.], 1985)

Taxonomic notes on the species - Barker, R. Wright (Reginald Wright) (Society of Economic Paleontologists and Mineralogists, 1960)