000
00236nam a22000857a 4500
008
210301b ||||| |||| 00| 0 eng d
050
_a
QC780 .C43
245
_a
Radiation sources
_c
CHARLES, A.
942
_2
lcc
_h
QC780 .C43 1964
999
_c
1076
_d
1076