Radio astronomy report; propagation through a disturbed ionosphere: effect upon range and angular resolution, Project Wide Band.

"RADC contract no. AF 30(602)-2077."

Point-to-point radio relay systems, 44 mc to 13,000 mc.

Mode of access: Internet.

Basic training in light assembly practice, radio. Prepared at Curriculum construction laboratory, Rochester, New York.

"Prepared in cooperation with the United States Office of Education"-p. [2] of cover.

Worldwide radio noise levels expected in the frequency band 10 kilocycles to 100 megacycles

Bibliography: p. 13.

Wheeler monographs; selected topics in radio and electronics.

Papers by H. A. Wheeler and associates.

Sources of radio information.

Caption title.

Sources of radio information.

"March 2, 1949."

Gemmae Frisii ... De radio astronomico & geometrico liber : in quo multa quae ad geographia[m], opticam, geometriam & astronomiam vtiliss. sunt, demonstrantur ...

Contiene en las últimas hojas sin foliar: Tabula gnomonica Geprgij Peurbachij.