@book{11059,
	author = {Sievers, A. F.},
	title = {Production of drug and condiment plants.},
	publisher = {U.S. Govt. Print Off.,},
	year = {1949]},
	series = {Farmers' bulletin},
	address = {[Washington,},
	note = {Contribution from Bureau of Plant Industry, Soils, and Agriculture Engineering.}
}