A model for predicting the unit cost of developing self-instructional materials in higher education biological and physical sciences

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100 1 ‡aChappell, Walter Grove, ‡d1941-
245 1 2 ‡aA model for predicting the unit cost of developing self-instructional materials in higher education biological and physical sciences / ‡cby Walter Grove Chappell.
260 ‡c1970.
300 ‡a5 unnumbered pages, xiii, 214 unnumbered leaves : ‡billustrations ; ‡c29 cm
336 ‡atext ‡btxt ‡2rdacontent
337 ‡aunmediated ‡bn ‡2rdamedia
338 ‡avolume ‡bnc ‡2rdacarrier
502 ‡gThesis ‡bPh.D. ‡cMichigan State University. Department of Secondary Education and Curriculum ‡d1970.
504 ‡aBibliography: leaves 123-130.
538 ‡aMode of access: Internet.
650 0 ‡aScience ‡xStudy and teaching (Secondary) ‡0http://id.loc.gov/authorities/subjects/sh85118601
CID ‡a102524812
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