@article{f8c8c8c4c4104777ad3f74606f202adb,
title = "Ganzen en zwanen in Nederland in 1990-95",
keywords = "dieren, populatiedichtheid, populatie-ecologie, mortaliteit, populatiegroei, anser, ganzen, cygnus, zwanen, inventarisaties, nederland, veldwerk, observatie, animals, population density, population ecology, mortality, population growth, anser, geese, cygnus, swans, inventories, netherlands, field work, observation",
author = "K. Koffijberg and J. Beekman and {van den Bergh}, L.M.J. and C. Berrevoets and B.S. Ebbinge and T. Haitjema and J. Philippona and J. Prop and B. Spaans and M. Zijlstra",
year = "1998",
language = "Nederlands",
volume = "71",
pages = "7--32",
journal = "Limosa",
issn = "0024-3620",
publisher = "Nederlandse Ornithologische Unie",
number = "1",
}