00337nam a2200109Ia 4500082002700000100003500027245008700062260002800149300001700177500000500194700002800199  a371.26091724bSc411.AT  aSchwarz, P. A. and Krug, R. E.  aAbility testing in developing countries; a handbook of principles and techniquesb  aNew YorkbPraegerc1972  axviii, 244p.  a  aKrug, R. E. ; jt. auth.