TY  - BOOK
AU  - Crowther, J.G.
TI  - Discoveries and invention of twentieth century
U1  - 608 21st ed.
PY  - 1955///
CY  - London
PB  - Routledge and Kegan Paul
KW  - Discoveries in science
KW  - Inventions
N1  - Index: pp 429-32
ER  -