@book{61661,
	author = {Campbell, Douglas Houghton,},
	title = {Elements of Structural and Systematic Botany :},
	publisher = {Project Gutenberg,},
	year = {2007},
	address = {Salt Lake City, UT :},
	note = {Release date is 2007-01-17},
	url = {https://www.gutenberg.org/ebooks/20390}
}