@book{12529,
	author = {Shear, G. M. and Shear, G. M.},
	title = {Commercial growing of watercress},
	publisher = {U.S. Dept. of Agriculture; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,},
	year = {1968]},
	series = {Farmers' bulletin no. 2233},
	address = {Washington]},
	note = {Supersedes his Growing watercresses, issued as U.S. Dept. of Agriculture. Leaflet no. 448.}
}