Proctor, B. S. (1890). A manual of pharmaceutical testing for the man of business and his assistants: Comprising simple instructions for the testing of the chemicals of the british Pharmacopœia etc. with such materials and appliances as are in common use at the dispensing counter. Chemist and druggist.

Proctor, Barnard S. A Manual of Pharmaceutical Testing for the Man of Business and His Assistants: Comprising Simple Instructions for the Testing of the Chemicals of the British Pharmacopœia Etc. with Such Materials and Appliances as Are in Common Use at the Dispensing Counter. London: Chemist and druggist, 1890.

Proctor, Barnard S. A Manual of Pharmaceutical Testing for the Man of Business and His Assistants: Comprising Simple Instructions for the Testing of the Chemicals of the British Pharmacopœia Etc. with Such Materials and Appliances as Are in Common Use at the Dispensing Counter. Chemist and druggist, 1890.