000
00279nam a2200109 4500
008
160616s 000 0
245
_a
Variational principles in the theory of collisions
100
_a
Demkov, Yu N
500
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C9B2:13 K3
942
_c
BK
_2
BK9671
080
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539.18 DEM
999
_c
9671
_d
9671