@book{7864,
	author = {Kellerman, Karl F. and Robinson, Thomas Ralph.},
	title = {Legume inoculation and the litmus reaction of soils.},
	publisher = {Govt. Print. Off.,},
	year = {1910.},
	series = {United States. Dept of Agriculture. Bureau of Plant Industry. Circular},
	address = {Washington,}
}