@article {Hanover:1973:0015-749X:263,
	author = "Hanover, James W.",
	title = "Notes: Morphology of Conifer Pollen as Revealed by the Scanning Electron Microscope",
	journal = "Forest Science",
	volume = "19",
	number = "4",
	year = "1973",
	abstract = "Morphology and surface texture of pollen representing seven coniferous species and one interspecific hybrid were studied using a scanning electron microscope. Variation within the species and that between Pinus densiflora, P. nigra, and their hybrid was slight. Pollen study may not be particularly useful for intraspecific taxonomic work with Pinus, Picea, or Abies. Forest Sci. 19:263-265.",
	pages = "263-265",
	url = "http://www.ingentaconnect.com/content/saf/fs/1973/00000019/00000004/art00007",
	keyword = "Pinus, Picea, Abies, interspecific hybrids"
}