@article {6019,
	title = {African orchids : XXI},
	journal = {Kew Bull.},
	volume = {8(1)},
	year = {1953},
	month = {1953},
	pages = {129 - 162},
	author = {Summerhayes, V. S.}
}
@article {3432,
	title = {Zur Kenntnis einiger indisch-chinesischer Monotropeen},
	journal = {Bot. Jahrb. Syst.},
	volume = {76},
	year = {1953},
	month = {1953///},
	pages = {103 - 108},
	author = {Andres, H.}
}
@article {3066,
	title = {Structure and development of the gametophyte of Psilotum nudum},
	journal = {Amer. J. Bot.},
	volume = {40},
	year = {1953},
	month = {1953///},
	pages = {649 - 658},
	author = {Bierhorst, D. W.}
}
