Sources
Apple blossoms, undated, by R.H. McKay, Photograph Number 94.0134, Mss 249, Rollin H. McKay Photographs.
Apple orchard, undated, by R.H. McKay, Photograph Number 94.0107, Mss 249, Rollin H. McKay Photographs.
Bitterroot apple blossoms, May 22, 1938, by R.H. McKay, Photograph number 94.2246, Mss 249, Rollin H. McKay Photographs.
Bitterroot Valley: Paradise Heights, Bitter Root Valley Land Company, Hamilton, Montana, circa 1905.
Bitterroot Valley: The Valley of Opportunity, Missoulian Publishing Company, 1908.
Fertile Flathead Valley, Great Northern Railroad Company, St. Paul, Minnesota, 1909.
Irrigation in Montana, Northern Pacific Railway Company, 1904.
Missoula, The Garden City, Missoula Chamber of Commerce, Missoulian Publishing Company, 1910.
Orchard in the Bitterroot, undated, by R.H. McKay, Photograph Number 94.1188, Mss 249, Rollin H. McKay Photographs.
Western Montana, Western Montana Association of Commercial Clubs, Missoula, Montana, 1913.
Your Opportunity in Montana: Go West Young Man, McIntosh-Morello Orchards Inc., Darby, Montana, 1924.