Mokler, A. J. (1939). Fort Caspar (Platte bridge station): Comprising a description of the killing of Lieutenant Caspar W. Collins and four soldiers of the Eleventh Kansas cavalry and the massacre of Sergeant Amos J. Custard and twenty of his comrades near the Platte bridge station, July 26, 1865. Casper, Wyo.: Prairie Pub. Co..

Mokler, Alfred James. Fort Caspar (Platte Bridge Station): Comprising a Description of the Killing of Lieutenant Caspar W. Collins and Four Soldiers of the Eleventh Kansas Cavalry and the Massacre of Sergeant Amos J. Custard and Twenty of His Comrades Near the Platte Bridge Station, July 26, 1865. Casper, Wyo.: Prairie Pub. Co., 1939.

Mokler, Alfred James. Fort Caspar (Platte Bridge Station): Comprising a Description of the Killing of Lieutenant Caspar W. Collins and Four Soldiers of the Eleventh Kansas Cavalry and the Massacre of Sergeant Amos J. Custard and Twenty of His Comrades Near the Platte Bridge Station, July 26, 1865. Casper, Wyo.: Prairie Pub. Co., 1939.