Callaghan
Mayer & Callaghan
Chronology
1906 Portland
Photographer’s Imprints
“Adolph Mayer, Portland, Oregon” The New York Public Library’s Photography Collection. See http://digitalcollections.nypl.org/items/510d47e0-4437-a3d9-e040-e00a18064a99
Bibliography
Cited as stereographers by Darrah.