000
00251nam a2200109Ia 4500
008
161118s2016 xx 000 0 und d
082
_a
370.78 M2E9
100
_a
Marshall, Sybil
245
0
_a
Experimental in Education
260
_c
1963
942
_2
ddc
999
_c
19763
_d
19763