TY  - BOOK
AU  - Roy, M K.
AU  - Dastidar, D Ghosh.
TI  - Cobol programming: : problems and solutions 
SN  - 0074518658
U1  - 005.135  1
PY  - 1998///
CY  - New Delhi
PB  - Tata McGraw Hill Publishing Company Ltd
KW  - Identification and environment division
KW  - Conditional and sequence control verbs
KW  - Sorting and merging of files
ER  -