Calipers
Subtitle: planning the systems approach to field testing educational products.
Contributors: Higginson, George M.
Published: 1969
Place of publication: Austin, Tex
Language: eng
Number of pages: 156
Subjects: Teaching -- Aids and devices
Other titles: Planning the systems approach to field testing educational products.
Notes: Compiled under the direction of George M. Higginson.

Photocopy. Springfield, Va., Clearinghouse for Federal Scientific and Technical Information, 1969. 163 p. on 84. 28 cm.

Includes bibliography.