000 00320nam a22001097a 4500
008 230613b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
245 _aChemistry of heterocyclic compounds
260 _aNew York:
_bConsultants Bureau
310 _aMonthly
942 _cCR
999 _c42598
_d42598