00594nam a2200193Ia 4500 226560 BIBL 20160527201416.0 681010s1968 njua b 00000 eng 68019972 EVLG 372.35 N428 Nelson, Pearl Astrid. Local 142056 Elementary school science activities by Pearl Astrid Nelson. Englewood Cliffs, N.J. Prentice-Hall [1968] ix, 210 p. illus. Bibliography: p. 199-202. Science Study and teaching (Elementary) Local 166868 169292 169292 0 0 0 372_350000000000000_N428 0 evl 328772 10 10 1 2016-05-27 135171 0 372.35 N428 80000000620016 2016-05-27 00:00:00 r:226560 z:NCC:D 6