https://catalogue-scientifique.canada.ca/record=3611317~S6*frc
Rechercher Hanson, Alan R; Rechercher MacInnis, Andrew Ronald Gordon; Rechercher Bowes, Susan M; Rechercher Pollard, J. Bruce
Canadian Wildlife Service, 1998
"Level ditching has been suggested as a method to provide waterfowl brood-rearing habitat along floodplains. Level ditches were excavated in 1988 and 1989 at...
Publication gouvernementale