00650nam a2200193   450000500170000000800410001702000150005804000230007305000230009608200210011910000290014024500550016925000120022426000310023630000350026749000920030250400300039465000320042420181210082631.0710218s1969    enka     b    000 0 eng    a0080129048  aDLCcDLCdBD-DhBPA00aLB1043b.C656 196900a371.3bCOA 1969 1 aCoppen, Helen Elizabeth.10aAids to teaching and learning / cby Helen Coppen.  a1st ed.  aOxford :bPERGAMON, c1969  ax, 230 p. :billus. ; c20 cm.0 aThe Commonwealth and International Library. Education and Educational Research Division  aBibliography: p. 225-230. 0aTeachingxAids and devices.