TY  - BOOK
AU  - AIYENGAR (N K N) and PRASAD (K N).
TI  - Introduction to invertebrate palaeontology
U1  - 562 AIYI 
PY  - 1996///
CY  - N D
PB  - Vikas publishing house
KW  - Invertebrate Paleontology Fossil
ER  -