@book{11903,
	author = {Day, Richard Hollis,},
	title = {Simple methods of estimating certain nonlinear functions with emphasis on agricultural data /},
	publisher = {U.S. Dept. of Agriculture, Economic Research Service,},
	year = {1963.},
	series = {Agriculture handbook / United States Department of Agriculture ;},
	address = {Washington, D.C. :}
}