
Butler, Gurdon Montague A Manual of Geometrical Crystallography: Treating Solely of Those Portions of the Subject Useful in the Identification of Minerals

Randall, Gurdon P. A Hand Book of Designs, Containing Plans in Perspective, of Court Houses, Universities, Academies, School Houses, Churches, Dwellings, Etc., Etc., ... Their Construction, Heating and Ventilation

Butler, Gurdon Montague Handbook of Mineralogy, Blowpipe Analysis, and Geometrical Crystallography, Volume 1, parts 1-3
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Butler, Gurdon Montague Handbook of Mineralogy, Blowpipe Analysis, and Geometrical Crystallography, Volume 1, parts 1-3

Butler, Gurdon Montague A Pocket Handbook of Minerals, Designed for Use in the Field of Class-Room With Little Reference to Chemical Tests

Butler, Gurdon Montague Pocket Handbook of Blowpipe Analysis: Designed for the Use of Students and Prsspectors With the Idea of Making Oral Instruction Unnecessary