TY  - BOOK
AU  - Bromley,R.G.
TI  - Trace fossils: Biology and taphonomy 
SN  - 0-04-445303-5
AV  - QE720.5 B76
PY  - 1990///
CY  - London
PB  - Unwin Hyman
KW  - Huellas fósiles
ER  -