Three ways to treat the IGRF on the earth's surface
By: Anne B. Kahle.
Contributors: Rand Corporation.
Series: Paper / Rand -- P-3955; P (Rand Corporation) -- P-3955.
Publisher: Rand Corp.
Published: 1968
Place of publication: [Santa Monica, Calif
Language: eng
Subjects: Geomagnetism.
Notes: Cover title.

"October 1968."

"P-3955."

Includes bibliographical references (p. 6).