Audio-visual equipment and materials
Subtitle: a guide to sources of information and market trends
By: [by Earl H. Young]
Contributors: United States. Business and Defense Services Administration.
Publisher: U.S. Business and Defense Services Administration; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 15
Subjects: Audio-visual education -- Bibliography.