"Minéralogie optique." . . "détermination (minéralogie) technique de laboratoire [manuel]" . . . . "Optic mineralogy." . . "Pétrologie Instruments." . . "Petrologia." . . . . . . . . . "Petrographic Methods and Calculations" . . . . . "Petrographic Methods and calculations" . . . . . "Petrographic methods and calculations : with some examples of results achieved" . . . . . . . . "Petrographic Methods and Calculations : with some examples of results achieved : by Arthur Holmes" . . "Petrographic methods and calculations: with some examples of results achieved"@en . "Petrographic methods and calculations, with some examples of results achieved"@en . "Petrographic Methods and calculations with some examples of results achieved" . . . . . . . . . "Petrographic methods and calculations with some examples of results achieved"@en . "Petrographic methods and calculations with some examples of results achieved" . "Petrographic methods and calculations" . "Petrographic methods and calculations"@en . . . "Petrographic Methods and Calculations, etc"@en . . . . . . . . . . . . . . . "Petrología Metodología." . . "pétrographie [manuel]" . . "Petrology." . .