The genus Baryspira (Mollusca) in New Zealand - Olson, O. P. (Wellington : New Zealand Dept. of Scientific and Industrial Research, New Zealand Geological Survey, 1956)
"February 1956."
Includes bibliographical references (p. 30-31) and index.
Keywords: Baryspira, Fossil -- New Zealand -- Classification; Baryspira -- New Zealand -- Classification; Paleontology -- Tertiary; Paleontology -- New Zealand