TY  - BOOK
AU  - Plas, Vander H.C
TI  - Ring transformations of heterocycles
SN  - 0-12-711702-4
PY  - 1973///
CY  - London
PB  - Academic Press
UR  - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=5864
ER  -