00807cam a2200217 a 450000500170000000800410001702000150005804000280007308200230010110000340012424500570015826000320021530000230024750000720027050400460034259000100038865000530039894200120045199900170046395201090048020181210002837.0820930s1982    enk           001 0 eng d  a0333316908  aBNBbengcBNBdBD-DhBPA  a371.3033bWAE 19821 aWagner, Leslie,d1943-92143914aThe economics of educational media /cLeslie Wagner.  aLondon :bMacmillan,c1982.  ax, 162 p. ;c23cm.  aTeaching aids: Audiovisual materials. Economic aspects (BNB/PRECIS)  aBibliography: p152-157. - Includes index.  amizan 0aAudio-visual educationxEconomic aspects.948743  2ddccBK  c16656d16656  102ddc4070aBPATCbBPATCcGENl0o371.3033 WAE 1982p52594r2018-04-11 00:00:00w2018-04-11yBKzmizan