@article {634,
	title = {Canopy Lichens with Blue-Green Algae: A Nitrogen Source in a Colombian Rain Forest},
	journal = {Ecology},
	volume = {56},
	number = {5},
	year = {1975},
	pages = {1176-1184},
	chapter = {1176},
	url = {http://www.jstor.org/stable/pdfplus/1936157.pdf},
	author = {Forman, Richard T.T.}
}
@article {711,
	title = {Erioderma sorediatum, a new lichen from New Zealand},
	journal = {The Lichenologist},
	volume = {7},
	number = {2},
	year = {1975},
	pages = {139-142},
	author = {Per Magnus J{\o}rgensen and David J. Galloway}
}
@article {712,
	title = {A new species of Psoroma with sorediate cephalodia},
	journal = {The Lichenologist},
	volume = {7},
	year = {1975},
	pages = {143-147},
	chapter = {143},
	author = {P.W. James and Aino Henssen}
}
@article {645,
	title = {Nitrogen Fixation by Lichens on Glacial Drift in Iceland},
	journal = {New Phytologist},
	volume = {74},
	number = {1},
	year = {1975},
	pages = {41-49},
	chapter = {41},
	url = {http://www.jstor.org/stable/pdfplus/2431670.pdf},
	author = {Crittenden, P.D.}
}
@article {130,
	title = {Nitrogen Metabolism in Lichens. VII. Nitrogenase Activity and Heterocyst Frequency in Lichens with Blue-Green Phycobionts},
	journal = {New Phytologist},
	volume = {75},
	number = {2},
	year = {1975},
	pages = {239-244},
	chapter = {239},
	url = {http://www.jstor.org/stable/2430715},
	author = {C.J.B. Hitch and J.W. Millbank}
}
