547.59
   Eld
  H
        Elderfield, Robert Cooley. 1904 - ed . Heterocyclic compounds . New York, J . Wiley [1950- t . 24 cm . Notas bibliográficas al pie de las páginas . Contiene : t . 1 . Three-, four-, five-, and six-membered monocyclic compounds containing onc O, N, and S atom.-t . 2 . Polycyclic five-and six-membered compounds containing one O or S atom.-t. 3 . Polycyclic derivatives of (Continua ficha 2)