@article {897,
	title = {The distribution and abundance of natural locations of Centaurium umbellatum Gilib., Frangula alnus Mill., Helichrysum arenarium (L.) Moench, and Hypericum perforatum L., in the area of voivodships of Poznan, Konin, Leszno, and Kalisz.},
	journal = {Herba Pol.},
	volume = {23},
	year = {1977},
	note = {Abstr. in Excerpta Bot., A, 33(4): p.281 (1979). Geog=1KBD, Royal Botanic Gardens, Kew.},
	pages = {149 - 154 (1977).},
	keywords = {Systematics: ANGIOSPERMAE COMPOSITAE: HELICHRYSUM},
	author = {Kowal, T and Pic, S and Wesolowska, M and Buk, B and Rydzewska, H}
}
@article {824,
	title = {Notes on some Nepalese and Indian Hypericum.},
	journal = {J. Jap. Bot.},
	volume = {52},
	number = {part 9},
	year = {1977},
	note = {Summary languages(s): JaMaps. Geog=6KBD, Royal Botanic Gardens, Kew.},
	pages = {276 - 288 (1977) -   maps, keys.},
	keywords = {Systematics: ANGIOSPERMAE HYPERICACEAE: HYPERICUM},
	author = {Robson, NKB}
}
@article {825,
	title = {Studies in the genus Hypericum L. (Guttiferae): 1. Infrageneric classification.},
	journal = {Bull. Brit. Mus. (Nat. Hist.), Bot.},
	volume = {5},
	number = {part 6},
	year = {1977},
	note = {Maps. Geog=1 - 7KBD, Royal Botanic Gardens, Kew.},
	pages = {291 - 355 (1977) -   Maps.},
	keywords = {Systematics: ANGIOSPERMAE HYPERICACEAE: HYPERICUM},
	author = {Robson, NKB}
}
