Books by Butler, G. M.
Petrology, condensed and simpl
Petrology, condensed and simplified
Some facts about ore deposits
Some facts about ore deposits
Uranium and radium
Uranium and radium
A manual of geometrical crystallography
Clays of eastern Colorado
Clays of eastern Colorado
Pocket handbook of blowpipe analysis designed for the use of students and prospectors with the idea of making oral instruction unnecessary
A pocket handbook of minerals
A pocket handbook of minerals designed for use in the field or class-room with little reference to chemical tests