Robert R. Shrock & William H. Twenhofel books & textbook
Principles of invertebrate paleontology (McGraw-Hill series in the Earth Sciences)
Robert R. Shrock & William H. Twenhofel
McGraw-Hill /1953T Hardcover / 816 Pages
Robert R. Shrock & William H. Twenhofel
McGraw-Hill /1953T Hardcover / 816 Pages