TY  - BOOK
AU  - x, x
AU  - Katritzky,A.R.
TI  - Physical methods in heterocyclic chemistry : x 
SN  - x   
U1  - 547.59/KAP  
PY  - 1963///
CY  - N.Y. 
PB  - Academic press
KW  - Chemistry, organic
KW  - Chemistry
N1  - Includes
ER  -