Halse, S.A., Vervest, R.M., Munro, D.R., Pearson, G.B. and Yung, F.H. 1992. Annual waterfowl counts in south-west Western Australia – 1989/90. Technical Report 29. Department of Conservation and Land Management, Perth, 50 pp. Download
Halse, S.A., Vervest, R.M., Munro, D.R., Pearson, G.B. and Yung, F.H. 1992. Annual waterfowl counts in south-west Western Australia – 1989/90. Technical Report 29. Department of Conservation and Land Management, Perth, 50 pp. Download