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@article{Barstad2009a,
author = "Barstad, A.",
title = "Vennskap: Gode venner- sjeldne fugler? [Friendship: Good friends – rare birds?]",
year = 2009,
journal = "Samfunnsspeilet",
publisher = "Statistics Norway",
volume = 23,
number = 1,
pages = "69-73",
url = "http://www.ssb.no/ssp/utg/200901/ssp.pdf"
}