TY  - BOOK
AU  - Mohinder Pratap ''Chand''
TI  - Colon classification: its structure and working a programmed text 
U1  - 025.4 
PY  - 1984///
CY  - New Delhi 
PB  - Sterling Publishers 
KW  - Colon classification -- Programmed instruction
KW  - Colon classification
ER  -