1. Equinoides del cretácico del norte de México Author/Creator: Buitrón, Blanca Estela Publication/Creation: México : Universidad nacional autónoma de México. Instituto de geologia, 1971 Resource Type: Book Access & Availability: Loading
2. Estudio de algunas algas calcáreas del Cretácico Superior y del Eoceno de la region central del Estado de Chiapas, México Author/Creator: Ayala-Castañares, Agustín Publication/Creation: México : Instituto de Geología, 1965 Resource Type: Book Is Part Of: Bound with: QE749 .M45 NO.19-26 ; Moluscos del Terciario Inferior del noreste de México. Access & Availability: Loading
3. Estudio de algunos microfósiles planctónicos de las calizas del Cretácico Superior de la República de Haiti Author/Creator: Ayala-Castañares, Agustín Publication/Creation: México : [publisher not identified], 1959 Resource Type: Book Is Part Of: Bound with: QE749 .M45 NO.2-NO.11 ; Pelecípodos y gasterópodos del Cretácico Inferior de la región de San Juan Raya-Zapotitlán, Estado de Puebla / Access & Availability: Loading
4. Estudios geológicos y paleontológicos sobre la cordillera oriental de Colombia ... Author/Creator: Colombia. Departamento de Minas y Petróleos Publication/Creation: Bogotá : Druck: P. & G. Gärtner, 1937/1938 Resource Type: Book Access & Availability: Loading
5. Exogyra olisiponensis Sharpe and Exogyra costata Say in the Western Interior Author/Creator: Reeside, John B., Jr., 1889-1958, (John Bernard), author Publication/Creation: [Washington, D.C.] : [Department of the Interior, U.S. Geological Survey], [1929] Resource Type: Book Access & Availability: Loading
6. Exogyra olisiponensis Sharpe and Exogyra costata Say in the Western Interior Author/Creator: Reeside, John B., Jr., 1889-1958. (John Bernard) Publication/Creation: Washington, D.C. : U.S. G.P.O., 1929, [i.e. 1930] Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 153-156. Access & Availability: Loading