00619nam a2200205Ia 4500 226632 BIBL 20160527201422.0 700504s1970 maua b 00110 eng 74107386 EVLG 372.35 T435 Thier, Herbert D. Local 179286 Teaching elementary school science a laboratory approach [by] Herbert D. Thier. Lexington, Mass. Heath [1970] vii, 273 p. illus. 920901 Includes bibliographies. Science Study and teaching (Elementary) Local 166868 169346 169346 0 0 0 372_350000000000000_T435 0 evl 328990 10 10 1 2016-05-27 135306 0 372.35 T435 80000000592942 2016-05-27 00:00:00 r:226632 z:NCC:D 6