000 00312nam a22001097a 4500
008 230712b |||||||| |||| 00| 0 eng d
022 _a1310-0157
040 _aNational Science Library
_cNational Science Library
245 _aBulgarian journal of physics
260 _aBulgaria:
_bVTD Hemus,
_c1974
942 _cCR
999 _c51839
_d51839