Clear mylar templates used to measure latitude and longitude of sample localities at scales of 1:63,360, and 1:250,000 between the latitudes of 49⁰00'00" and 71⁰30'00" N. or S.

Campbell, W. L. (Wesley Lyle), 1937-
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Notes

  • Microfiche. [Denver, Colo. : U.S. Geological Survey, 1982?]. 3 microfiches ; 11 x 15 cm.
  • Bibliography: page 3.
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