Cline, Walter M.. The Great Smoky Mountains National Park : 68 Full Color Pictures. Revised Edition. Chattanooga, TN: Cline Photo, 1973.

Cline, Walter M.. Air View of Gatlinburg, Tennessee at the Entrance to the Great Smoky Mountains National Park. Tennessee State Library and Archives: Tennessee Postcard Collection, 1962.

Cline, Walter M.. Walter M. Cline Photographs, circa 1930s In Walter M. Cline Photographs. Knoxville, TN: University of Tennessee Libraries, Special Collections , 1935.