000
00281nam a2200109Ia 4500
082
_a
507
_b
THI
100
_a
D.Thier
245
_a
teaching elementary school science A laboratory Approach
_c
Herbert D.Thier
260
_a
America
_b
Heath and company
_c
1970
300
_a
273
942
_c
BK
999
_c
7349
_d
7349