Hawkins, G.L. Pigment Printing: the Bromoil Process from the Negative to the Transfer. London/Boston: Henry Greenwood & Co./American Photographic Publishing Co., 1933.

Hawkins, G.L. Pigment Printing: the Bromoil Process from the Negative to the Transfer. London/Boston: Henry Greenwood & Co./American Photographic Publishing Co., 1933.