@book{89029,
	author = {Pitz, Henry Clarence},
	title = {How to draw trees},
	publisher = {Watson-Guptill Publications},
	year = {[1972]},
	address = {New York},
	edition = {Rev., enl. ed. of Drawing trees.},
	note = {First ed. published in 1956, under title: Drawing trees.}
}