TY  - BOOK
AU  - Espich, James E.
AU  - Williams, Bill 
TI  - Developing programmed instructional materials: A handbook for program writers 
U1  - 370.777  
PY  - 1967///
CY  - London
PB  - Sir Isaac Pitman and Sons
KW  -           Programmed instruction
KW  - Authorship
ER  -