@book{21505,
	author = {Sharp, Lester W.},
	title = {An introduction to cytology /},
	publisher = {McGraw-Hill book,},
	year = {1926.},
	series = {McGraw-Hill publications in the agricultural and botanical sciences, C.V. Piper, consulting editors},
	address = {New York :},
	edition = {2nd ed.}
}