Das Eigenrauschen radio-astronomischer Empfänger zur Messung der Wasserstoff Strahlung. 1961, Willwacher, E., (Ikke digitaliseret)
Chinese scientific and technical serial publications in the collections of the Library of Congress. [2.] ed. 1961, (Ikke digitaliseret)
Static relays for electronic circuits. Based on the Static relays symposium sponsored "by Electronic Components Res. Dep.,U.S.Army Signal Res.and Development Lab. 1961, (Ikke digitaliseret)
Bureau of Reclamation: Appropriation acts and allotments. A chronological compilation of allotments and appropriations. Washington,U.S.Government Prtg. Off.,1961. 1961, (Ikke digitaliseret)
Statistisches Taschenbuch der Deutschen Demokratischen Republik 1961. Hrsg.v.d. Staatlichen Zentralverwaltung für Statistik. 1961, (Ikke digitaliseret)
Che rdynt s e v, Y. Y. Abundance of chemical elements. Chicago, 111,,The Univ.of Chicago Press,1961. IO 1961, (Ikke digitaliseret)
Kinetische Stabilität elastischer Systeme. Berlin,VEB Deutscher Verlag der Wissenschaften,1961. 1961, (Ikke digitaliseret)