000 00451nam a2200181 4500
020 _a
_c
082 _a560.45 SHR-P
100 _aShrock, Robert R; Twenhofel, William H
245 _aPrinciples of invertebrate paleontology
250 _a
260 _aMcGraw-Hill book Co, Inc., NewYork
_c1953
300 _a
490 _a
500 _a
590 _aVIN
_b
_c
650 _aPaleoecology and fossils of specific environments
942 _cBK
999 _c540223
_d540223