| Citation | Mittelhauser, G.H., J.B. Drury and P.O. Corr 2002 Harlequin ducks (Histrionicus histrionicus) in Maine, 1950-1990. Seabirds Northeastern Naturalist 9(2):163-182. |
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| Ref. No. | 6997 |
| Language | English |
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