TY  - GEN
AU  - De Roos,G.Th
TI  - Impact of tourism upon some breeding wader species on the ISLE of Vlieland in the Netherlands Wadden Sea
PY  - 1981///
CY  - Wageningen
PB  - H. Veenman & Zonen B.V.
KW  - Tourism
KW  - Wader
ER  -