TY  - BOOK
AU  - Gordon,Mackenzie
AU  - Yochelson,Ellis L.
TI  - Gastropoda, Cephalopoda, and Trilobita of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming
T2  - Professional paper - Geological Survey
U1  - 564.309787 
PY  - 1975///
CY  - Washington, D.C
PB  - United States Government Printing Office
KW  - Gastropoda, Fossil
KW  - Wyoming
KW  - Cephalopoda, Fossil
KW  - Trilobites
KW  - Paleontology
KW  - Carboniferous
KW  - Geology
KW  - Survey
N1  - Includes index; Bibliography: p. F27-F28
ER  -