@article {9398,
	title = {Variations in Mediterranean Crossbills (<i>Loxia curvirostra</i>).},
	journal = {Bulletin of the British Ornithologist{\textquoteright}s ClubBulletin of the British Ornithologist{\textquoteright}s Club},
	volume = {107},
	number = {3},
	year = {1987},
	pages = {118-129.},
	keywords = {Aves},
	author = {Massa, B.}
}
