TY  - BOOK
AU  - Schramm, Wilbur Lang
TI  - Notes on instructional cross-media comparisons
PY  - 1971///
CY  - Washington, D.C.
PB  - Information Center on Instructional Technology, Academy for Educational Development
KW  - Tecnología educativa
KW  - Educación no formal
KW  - Programas
N1  - Folletería permanente; Bibliografía: p. 52-53
ER  -