000
00317nam a2200145Ia 4500
020
_a
0170092429
082
_b
1886
_a
500
100
_a
"KEYSTONE DAVID"
245
0
_a
YOU TOO CAN BE A SCIENTIST
260
_c
1991
300
_a
32
944
_c
BK
999
_c
351386
_d
351386