00947nam a2200205Ia 4500001000700000003000500007005001700012008004100029100003700070245016400107250001100271260002500282300001700307490004700324500008500371650003400456700004300490999001900533952018900552143920BIBL20160527194502.0920512|1967||||mx |||||||||||00010|spa|d10aSchain, Robert L.2Local916583010aObtención y empleo de medios de enseñanza económicos y gratuitoscpor Robert L. Schain y Murray Polner; traducción al español por Vincent Agut Armer.  a1. ed.0 aMexicobUTEHAc1967.  a197 p.bill.0 aManuales UTEHA, educación2Local9130579  aTranslation of : Where to get and how to use free and inexpensive teaching aids. 0aFree materials.2Local99878810aPolner, Murray, jt. au.2Local9152338  c120309d120309  00102ddc406371_330000000000000_S296W_E708abref9240457a1b1c22d2016-05-27ePorrĐag1.40i216874l0o371.33 S296w Ep60000010051776r2016-05-27 00:00:00xr:143920 x z:NCC:Dy9