@book{3d45515bfcea46bcb618a5aeebaec5f8,
title = "Voorkomen, talrijkheid, schade en beheer van knobbelzwanen (Cygnus olor) in Nederland",
keywords = "dieren, cygnus, fauna, jachtvogels, nederland, plantenplagen, bescherming, zwanen, wildbescherming, wildbeheer, animals, cygnus, fauna, game birds, netherlands, plant pests, protection, swans, wildlife conservation, wildlife management",
author = "T.A. Renssen",
year = "1980",
language = "Nederlands",
series = "Rapport / Rijksinstituut voor Natuurbeheer",
publisher = "R.I.N.",
number = "no. 80/12",
}