Magnetograms and hourly values, Tucson, Arizona /
Coast and Geodetic Survey.

Description

Viewability

Item Link Original Source
Full view   1950-51 University of California
Full view   1952-54 University of California
Full view   1954-1957 University of Illinois at Urbana-Champaign
Full view   1955-57 University of California
Full view   1958-60 University of California
Full view   1958-1961 University of Illinois at Urbana-Champaign
Full view   1961-63 University of California
Full view   1962-1963 University of Illinois at Urbana-Champaign