000
00267nam a22000857a 4500
008
210303b ||||| |||| 00| 0 eng d
050
_a
QC721
245
_a
Variational principles in the theory of collisions
_c
DEMKOV, YU N.
942
_2
lcc
_h
QC721 .D46 1963
999
_c
1383
_d
1383