000
00169nam a2200061Ia 4500
999
_c
9262
_d
9262
020
_a
9525
082
_a
530
_b
yav
100
_a
B.M yavorsky
245
_a
physics
_c
B.M yavorsky
260
_b
Mir publisher
_c
1979
300
_a
654 p
942
_c
BKC