@book {5497,
	title = {Prodromus einer Flora von S{\"u}dwestafrika. Lieferung 21: Fam. 34},
	year = {1968},
	note = {010, 087, 151, 206},
	publisher = {Verlag von J. Cramer},
	organization = {Verlag von J. Cramer},
	chapter = {1-3},
	address = {Lehre},
	author = {Roessler, H. and A. Schreiber},
	editor = {Merxm{\"u}ller, H.}
}
@book {5445,
	title = {Manual of the vascular flora of the Carolinas},
	year = {1968},
	note = {016},
	publisher = {The University of North Carolina Press},
	organization = {The University of North Carolina Press},
	chapter = {475-476},
	address = {Chapel Hill},
	author = {Radford, A. E. and H. E. Ahles and C. R. Bell}
}
@book {5415,
	title = {Arboles tropicales de M{\'e}xico},
	year = {1968},
	note = {041, 080, 167},
	publisher = {Instituto Nacional de Investigaciones Forestales},
	organization = {Instituto Nacional de Investigaciones Forestales},
	chapter = {142-147},
	address = {M{\'e}xico},
	author = {Pennington, T. D. and J. Sarukhan}
}
@book {5404,
	title = {Forest flora of Melghat},
	year = {1968},
	note = {010, 015, 110, 148},
	publisher = {Bishen Singh Mahendra Pal Singh},
	organization = {Bishen Singh Mahendra Pal Singh},
	chapter = {15-18},
	address = {Dehradun},
	author = {Patel, R. I.}
}
@book {5146,
	title = {Genera et species plantarum Zeylaniae},
	year = {1968},
	note = {004, 007, 010, 015, 027, 039, 048, 074, 110, 113, 132, 143, 148, 172, 198, 206},
	publisher = {Lake House Investments Ltd.},
	organization = {Lake House Investments Ltd.},
	chapter = {14-19},
	address = {Colombo},
	author = {Gunawardena, D. C.}
}
@book {277,
	title = {Catalogue of African plants collected by Dr. Friedrich Welwitsch in 1853 - 1861},
	volume = {1},
	year = {1968},
	publisher = {Longmans},
	organization = {Longmans},
	address = {London},
	url = {http://library.wur.nl/sfx_local?sid=WUR\%3ACLC\&pid=\%3Cisn\%3E547254\%3C\%2Fisn\%3E\&genre=book\&auinit=WP\&aulast=Hiern\&date=\%5Bca.\%201968\%5D\&title=Catalogue\%20of\%20African\%20plants\%20collected\%20by\%20Dr.\%20Friedrich\%20Welwitsch\%20in\%201853\%20-\%20\%5B18\%5D61 },
	author = {Hiern, W. P.}
}
