Summary of changes in ionospheric vertical soundings observing and scaling procedures
Subtitle: effective 1 January 1957
By: R.W. Knecht
Series: NBS Report -- 5033
Publisher: Boulder Laboratories, National Bureau of Standards, U.S. Dept. of Commerce
Published: 1956
Place of publication: Boulder, Colo
Language: eng
Number of pages: 20
Subjects: Ionosphere; Measurement; Ionospheric electron density
Notes: "NBS project 8240-12-8244."

"December 14, 1956."