Supplementary world maps of F2 critical frequencies and maximum usable frequency factors
By: Donald H. Zacharisen
Contributors: United States. National Bureau of Standards; Boulder Laboratories (U.S.); International Radio Consultative Committee
Series: National Bureau of Standards technical note -- 2-2; NBS technical note -- 2-2.
Publisher: National Bureau of Standards, United States Department of Commerce, Office of Technical Services
Published: 1960
Place of publication: Washington, D.C
Language: eng
Number of pages: 245
Subjects: Ionospheric radio wave propagation; Charts, diagrams; F region
Notes: Title from title screen (viewed Mar. 5, 2014).

"Boulder Laboratories"--Cover.

"October 1960."

"Prepared in response to Study program 60 and Recommendation 176 of the International Radio Consultative Committee (CCIR). This Technical Note supplements Technical Note 2 and together they present F2-layer prediction material for all months of the year."

Includes bibliographical references (page 10).