[No. 39. Rock Bluffs, Columbia River, Oregon]
2016795
Found In:
Beinecke Rare Book and Manuscript Library > [No. 39. Rock Bluffs, Columbia River, Oregon]
A mammoth plate is a photographic negative plate size, usually 18 by 21 inches (53.5 x 45.7 cm.) with photographic prints made through contact printing.