GILCHRIST T L, . (1992). HETEROCYCLIC CHEMISTRY. NEW YORK: JOHN WILLY & SONS NEW YORK.
GILCHRIST T L, . 1992. HETEROCYCLIC CHEMISTRY. NEW YORK: JOHN WILLY & SONS NEW YORK.
GILCHRIST T L, . HETEROCYCLIC CHEMISTRY. NEW YORK: JOHN WILLY & SONS NEW YORK. 1992.