WORTELBOER R A closer look at Common Swifts Apus apus: results of ten years of nest monitoring with cameras [samenvatting] [summary] [pdf only for members]
KLEEFSTRA R, BARKEMA L, VENEMA DJ & SPIJKSTRA-SCHOLTEN W A plague of voles, an invasion of breeding Short-eared Owls Asio flammeus in the province of Friesland in 2014 [samenvatting] [summary] [pdf only for members]
TIJSEN W & KOFFIJBERG K Thirty years of goose and swan counts in the north of the province of Noord-Holland [samenvatting] [summary] [pdf only for members]
JUKEMA J, KLEEFSTRA R, POSTMA J, JUKEMA J & STIENSTRA D The Quail Coturnix coturnix year 2011 from a Frisian perspective [samenvatting] [summary] [pdf only for members]
KLEEFSTRA R Andermans veren [samenvatting] [summary] [pdf only for members]
CAMPHUYSEN K, STIP A & KLAASSEN R RECENSIES en MEDEDELING NOU [samenvatting] [pdf only for members]
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