ALBERT B. PORTER, The Scientific Shop, 1906c

Kromskop Color-Photography : Circular 348 : October 1906 / The Scientific Shop [of] Albert B. Porter, 324 Dearborn Street, Chicago. – [S.l. : S.n.], 1906. – 12 p. : ill. ; 23 cm. – (Circulars from the Scientific Shop [of] Albert B. Porter ; 348)
Testo in inglese. – Posseduta anche la 2. ed., identica, datata May 1907.