000 00285nam a22000977a 4500
100 _aAgha Zul Qarnain Khan
245 _a Twisted push - pull ethylenes with thioxo groups : synthesis , stereochemistry , and reactions.
260 _aSweden:
_c1990.
300 _a78, 148 p.
942 _cBK
999 _c158580
_d158580