Northern Prairie Wildlife Research Center
Leiberg and Ayers were foresters who conducted some of the first forest inventories in Montana. Their reports are detailed accounts of the timber resources of specific areas.
Ayers, H.B. 1900. Flathead Forest Reserve. 20th Ann. Rep. U.S. Geol. Surv. 5:245-316. Washington, DC. Ayers, H.D. 1901. Lewis and Clark Forest Reserve, Montana. 21st Ann. Rep., Part 5. U.S. Dept. of the Interior, Geological Survey; 27-80. Washington, DC. Leiberg, J.B. 1897. General report on a botanical survey of the Coeur d' Alene Mountains in Idaho during the summer of 1895. U.S. Govt. Print. Off. Contributions from the U.S. National Herbarium vol. 5, no. 1, 85 pp. Leiberg, J.B. 1898. Forestry of the Bitterroot Reserve. U.S. Geol. Surv. 19th Ann. Rep. 5:253-282. Leiberg, J.B. 1899. The Priest River Forest Reserve. U.S. Govt. Print. Off. pp. 217-252. Leiberg, J.B. 1900. The Bitterroot Forest Reserve. U.S. Govt. Print. Off. pp. 317-410. Leiberg, J.B. 1904. Little Belt Mountains Forest Reserve, Montana and the Belt Mountains quadrangle. Prof. Pap. No. 30 Denver, CO. U.S. Dept. of the Int., Geol. Sur. 1-75. Leiberg, J.B. 1904. Forest conditions in the Absaroka division of the Yellowstone forest reserve, Montana, and the Livingston, and Big Timber quadrangles. U.S. Govt. Print. Off. Geological Survey Professional Paper. 148 pp.