[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - Electrothermal hydrazine thruster developmentMURCH, C.; HUNTER, C.

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - The flight of the FRUSAWOLFF, G.; WITTMANN, A. · 1972

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - Nuclear Electric Propulsion mission operationsPRICKETT, W.; SPERA, R. · 1972

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - Propulsion requirements for communications satellitesISLEY, W.; DUCK, K.

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - High voltage solar array technologyHERRON, B.; BAYLESS, J.; WORDEN, J. · 1972

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - A capillary-fed annular colloid thruster

[American Institute of Aeronautics and Astronautics 9th Structural Dynamics and Materials Conference - Palm Springs,CA,U.S.A. (01 April 1968 - 03 April 1968)] 9th Structural Dynamics and Materials Conference - Structural radiatorsCOCKFIELD, R. · 1968

[American Institute of Aeronautics and Astronautics 9th Electric Propulsion Conference - Bethesda,MD,U.S.A. (17 April 1972 - 19 April 1972)] 9th Electric Propulsion Conference - The radiation influence on ionization front propagationZHURIN, V. · 1972

The American Camaenidae (Mollusca: Pulmonata)Charles B. Wurtz · Proceedings of the Academy of Natural Sciences of Philadelphia · 1955

On the CondylarthraProfessor Cope · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

On Uintatherium, Bathmodon and TriisodonE. D. Cope · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

On Supposed Tertiary AmmonitesJ. S. Newberry · Proceedings of the Academy of Natural Sciences of Philadelphia · 1882

Additions to the Library, 1887Proceedings of the Academy of Natural Sciences of Philadelphia · 1887

Notes on Peruvian TrochilidaeJames Bond · Proceedings of the Academy of Natural Sciences of Philadelphia · 1954

Notes on American MabuyasEmmett Reid Dunn · Proceedings of the Academy of Natural Sciences of Philadelphia · 1935

Fossil Vertebrates from FloridaDr. Leidy · Proceedings of the Academy of Natural Sciences of Philadelphia · 1889