TY  - BOOK
AU  - Crowther,J G
TI  - Discoveries And Inventions Of The 20 Th Century
U1  - R 509 CRO-D 
PY  - 1966///
CY  - London
PB  - Routledge & Kegan Paul
KW  - Historical, Geographic, Persons Treatment
KW  - History
ER  -