000
00306nam a2200121 4500
008
160616s 000 0
245
_a
Helium 3 Helium 4
100
_a
Keller, William E
440
_a
International cryogenics monograph series
500
_a
C4D1 K9
942
_c
BK
_2
BK8939
080
_a
536.48 KEL
999
_c
8939
_d
8939