TY  - BOOK
AU  - Elrod, J. McRee
TI  - Construction and adaptation of the unit card
AV  - Z 674 E47.1980
PY  - 1980///
CY  - Metuchen, N.J.
PB  - Scarecrow
KW  - Catalogación -
KW  - Instrucción programada
N1  - "The third edition incorporates a number of revisions and corrections and is current as of 1980"; Incluye índice
ER  -