@article {152,
	title = {Numbers of black redstarts on passage in Man.},
	journal = {British Birds 33(9): 252-254.},
	year = {1940},
	pages = {566},
	author = {Williamson, K.}
}
@article {153,
	title = {Fair Isle Bird observatory.  First report, 1948.},
	journal = {The Scottish Naturalist 61: 19-31.},
	year = {1949},
	pages = {567},
	author = {Williamson, K.}
}
@article {155,
	title = {Fleas and flatflies.},
	journal = {Bulletin of the Fair Isle Bird Observatory 7: 45-48.},
	year = {1952},
	pages = {569},
	author = {Williamson, K.}
}
@article {157,
	title = {Records of fleas from Fair Isle birds.},
	journal = {Bulletin of the Fair Isle Bird Observatory 1: 36.},
	year = {1952},
	pages = {570},
	author = {Williamson, K.}
}
@article {158,
	title = {Bird fleas at Fair Isle in spring 1954.},
	journal = {Bulletin of the Fair Isle Bird Observatory 2: 235-236.},
	year = {1954},
	pages = {571},
	author = {Williamson, K.}
}
@article {159,
	title = {Records of bird-fleas at Fair Isle in summer and autumn, 1954.},
	journal = {Bulletin of the Fair Isle Bird Observatory 2: 323-324.},
	year = {1955},
	pages = {572},
	author = {Williamson, K.}
}
@article {154,
	title = {Ectoparasites.},
	journal = {Report of the Fair Isle Bird Observatory (1950): 40-41.},
	year = {1951},
	pages = {568},
	author = {Williamson, K.}
}
