@book{9726,
	author = {Hitchcock, A. S.},
	title = {The genera of grasses of the United States},
	publisher = {[U.S. Govt print. off.,},
	year = {1936]},
	series = {U. S. Dept of Agriculture.  Bulletin no. 772.  Professional paper.},
	address = {Washington},
	edition = {Issued March 1920; revised May 1936.},
	note = {Contribution from Bureau of plant industry.}
}