Pilot study of the preparation of world maps of F2 critical frequencies and maximum usable frequency factors
By: by Edwin L. Crow and Donald H. Zacharisen
Contributors: Zacharisen, Donald H.
Series: NBS project -- 8220-12-8227; NBS Report -- 5560
Publisher: U.S. Dept. of Commerce, National Bureau of Standards, Boulder Laboratories
Published: 1958
Place of publication: Boulder, Colo
Language: eng
Number of pages: 68
Subjects: Ionospheric radio wave propagation; Sunspots; Statistics; Ionospheric forecasting
Notes: "February 28, 1958."

Includes bibliographical references (p. 68).