An Improved Form of Petrological Microscope: With Some General Notes on the Illumination of Microscopic Objects

G. W. Grabham

Geologist to the Sudan Government

Mineralogical Magazine; September 1910 v. 15; no. 72; p. 335-349; DOI: 10.1180/minmag.1910.015.72.01
© 1910, The Mineralogical Society
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