Black, A. D. (1929). Progressive record and accounting system for dentists: Yearly record book. Physicians' Record Co..
Lua i Stíl Chicago (17ú heag.)Black, Arthur D. Progressive Record and Accounting System for Dentists: Yearly Record Book. Chicago: Physicians' Record Co., 1929.
Lua MLA (8ú heag.)Black, Arthur D. Progressive Record and Accounting System for Dentists: Yearly Record Book. Physicians' Record Co., 1929.
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