@book{111467,
	author = {Martin, O. B.},
	title = {A decade of negro extension work, 1914-1924},
	publisher = {Project Gutenberg,},
	year = {2023},
	series = {United States Department of Agriculture, Miscellaneous Circular No. 72},
	address = {Salt Lake City, UT :},
	note = {Release date is 2023-05-11},
	url = {https://archive.org/details/decadeofnegroext72mart/page/n1/mode/2up}
}