SHROCK, ROBERT.R TWENHOFEL, WILLIAM .H
PRINCIPLES OF INVERTEBRATE PALEONTOLOGY - 2nd Ed. - New York McGraw-Hill Book Company Limited, New York 1953
562 / TWE/PR
PRINCIPLES OF INVERTEBRATE PALEONTOLOGY - 2nd Ed. - New York McGraw-Hill Book Company Limited, New York 1953
562 / TWE/PR