Teaching and media : a systematic approach /
Gerlach, Vernon S. , 1922-
Teaching and media : a systematic approach / Vernon S. Gerlach, Donald P. Ely. - Englewood Cliffs, N.J. : Prentice-Hall , 1971. - 392 p. : ill. ; 24 cm.
Includes bibliographical references.
0138913331
Audio--Visual education.
Teaching--Aids and devices.
Teaching and media : a systematic approach / Vernon S. Gerlach, Donald P. Ely. - Englewood Cliffs, N.J. : Prentice-Hall , 1971. - 392 p. : ill. ; 24 cm.
Includes bibliographical references.
0138913331
Audio--Visual education.
Teaching--Aids and devices.
