Twenhofel, W. (1953). Principles of invertebrate paleotology. McGraw Hill.
Chicago Style CitationTwenhofel, W.H. Principles of Invertebrate Paleotology. McGraw Hill, 1953.
MLA CitationTwenhofel, W.H. Principles of Invertebrate Paleotology. McGraw Hill, 1953.
Warning: These citations may not always be 100% accurate.