@booklet {5714,
	title = {WILLIAMS, J.F. 1891. The igneous rocks of Arkansas. Annual Report of the Geological Survey of Arkansas for 1890: 1-457.},
	year = {1891},
	note = {WILLIAMS, J.F. 1891. The igneous rocks of Arkansas. Annual Report of the Geological Survey of Arkansas for 1890: 1-457.}
}
@booklet {5717,
	title = {WILLIAMS, J.F. 1891. The igneous rocks of Arkansas. Annual Report of the Geological Survey of Arkansas for 1890: 1-457},
	year = {1891},
	note = {WILLIAMS, J.F. 1891. The igneous rocks of Arkansas. Annual Report of the Geological Survey of Arkansas for 1890: 1-457}
}
