@book{202269,
	author = {Zhivkov, Todor. and Balev, Milko.},
	title = {For a highly intensive and effective agriculture /},
	publisher = {Sofia Press,},
	year = {1985.},
	address = {Sofia :},
	note = {Title in colophon: Za visokointenzivno i efektivno selsko stopanstvo.}
}