TY  - BOOK
AU  - Mount, Ellis.
AU  - List, Barbara A
TI  - Milestones in science and technology :the ready reference guide to discoveries, inventions, and facts 
SN  - 8173712077
U1  - 509 
PY  - 1994///
CY  - Hyderabad
PB  - Universities Press
KW  - Inventions
ER  -