000
00257nam a2200109 4500
082
_a
547059 KAT
100
_a
Katritzky,Alan R.
245
_a
The Principles of Hetrocyclic Chemistry
260
_a
New York
_b
Acadamic Press
_c
1968
300
_a
183
942
_c
REF
999
_c
3520
_d
3520