00707nam a2200217 4500 20890 20890 3153267 OSt 20170120150449.0 700504s1970 maua b 001 0 eng 74107386 DLC DLC DLC LB1585 .T5 372.3/5 Thier, Herbert D. Teaching elementary school science; a laboratory approach [by] Herbert D. Thier. Lexington, Mass., Heath [1970] vii, 273 p. illus. 25 cm. Includes bibliographies. Science Study and teaching (Elementary) 7 cbc orignew u ncip 19 y-gencatlg lcc BOOKS LB 1585 .T45 1970 0 0 lcc 0 0 MUC MUC TECH 2017-01-20 Donation (BFA) 0 LB 1585 .T45 1970 30420 2018-07-24 2017-01-20 BOOKS