TY  - BOOK
AU  - Crowther, J. G.
TI  - Discoveries and inventions of the 20th century
PY  - 1966///
CY  - London
PB  - Routledge & Kegan Paul
UR  - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=3914
ER  -