Irwin, A. (1912). Dental laws, condensed: A brief guide to the requirements of dental examiners from applicants for a license to practice dentistry in the United States of America and island possessions, Canada and the provinces, also, the leading civilized countries throughout the world. C.S. Magrath].

Irwin, Alphonso. Dental Laws, Condensed: A Brief Guide to the Requirements of Dental Examiners from Applicants for a License to Practice Dentistry in the United States of America and Island Possessions, Canada and the Provinces, Also, the Leading Civilized Countries Throughout the World. [Camden, N.J.: C.S. Magrath], 1912.

Irwin, Alphonso. Dental Laws, Condensed: A Brief Guide to the Requirements of Dental Examiners from Applicants for a License to Practice Dentistry in the United States of America and Island Possessions, Canada and the Provinces, Also, the Leading Civilized Countries Throughout the World. C.S. Magrath], 1912.