Six-membered heterocyclic nitrogen compounds with three condensed rings [by] C.F.H. Allen, in collaboration with G.M. Badger [and others]Charles Francis Hitchcock Allen · First published 1958Open the Tome
Six-membered heterocyclic nitrogen compounds with four condensed rings [by] C.F.H. Allen, in collaboration with D.M. Burness [and others]Charles Francis Hitchcock Allen · First published 1951Open the Tome
Mensaje de Su Excelencia C.H. Allen a las dos camaras de la legislatura de Puerto-Rico, dic. de 1900Puerto Rico. Governor (1900-1901 : Allen) · First published 1900Open the Tome
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