TY  - BOOK
AU  - Frey, Robert W. 
TI  - The Study of Trace Fossils: a Synthesis of Principles, Problems, and Procedures in Ichnology 
SN  - 3540068708 :
U1  - 550 23
PY  - 1975///
CY  - Berlin, Heidelberg
PB  - Springer Berlin Heidelberg
KW  - Earth Sciences
N1  - Include Bibliography and Index
ER  -