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Status of the North American Population of the European Tree Sparrow
Jon C. Barlow
No. 14, A Symposium on the House Sparrow (Passer domesticus) and European Tree Sparrow (P. Montanus) in North America (1973), pp. 10-23
Published by: American Ornithological Society
Stable URL: http://www.jstor.org/stable/40168052
Page Count: 14