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040 _aCY-NiAOA
_btur
_cCY-NiAOA
041 _aeng
082 _a371.3 RYB
090 _a371.3 RYB
100 _aRyburn, W. M.
245 _aPrinciples of teaching
_cW. M. Ryburn and K. B. Forge
250 _a2nd edi.
260 _aLondon
_bOxford University Press
_c1957
300 _a216 p.
_c18 cm.
700 _aForge, K. B.
_92888
942 _2ddc
_cBK
999 _c4332
_d4332