000 00616 a2200289 4500
001 17119
020 _a13
041 _aeng
080 _a56 Shr
245 _aPrinciples of invertebrate paleontology
250 _a2nd rev. & enl. ed
260 _aNew York
260 _bMcGraw-Hill,
260 _c1953
300 _axx,816 p.
300 _c23 cm
490 _aIRDC TS 6e : 1977
100 _aShrock, Robert R.
700 _aTwenhofel, William H.
700 _a
650 _a
650 _aInvertebrates
650 _aPaleontology
650 _aInvertebrates, Fossil
942 _cBK
942 _2UDC
999 _c19290
_d19290