00000cam a22000003i 4500 UP-1685594773861771639 Buklod 20100220103426.0 a r |||| u| ta 170419s1971 nyu r |||| u|eng d (iLib)UPBAG-00007282680 DLC BAG rda eng LB 2806 P45 Perkinson, Henry L. author. The possibilities of error an approach to education Henry L. Perkinson. New York David McKay Company, Inc. ©1971. ix, 124 pages 21 cm Educational policy, planning, and theory Educational planning. Education AIms and objectives. FO UPBAG UPBAG-MAIN LB 2806 P45 Book