Distribution of magnetic declination in U.S. for Jan. 1, 1915, with isogonic chart and secular change tables.

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Bibliographic Details
Online Access:	Full Text (via ProQuest)
Corporate Author:	U.S. Coast and Geodetic Survey
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1920.
Subjects:	Magnetism. Astronomy. Cities and towns. Maps.

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Full Text (via ProQuest)

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Call Number:	C4.19-33
C4.19-33	Available