Exposure of waterfowl to lead: a nationwide survey of residues in wing bones of seven species, 1972-73
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Special Scientific Report - Wildlife↗
Geology topics
Robert I. Smith
Publications and source records attributed to Robert I. Smith.
Black duck distribution, harvest characteristics, and survival
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Special Scientific Report - Wildlife↗
Pre-hunting-season banding of mallards and black ducks progress report, 1959 and 1960
No abstract available.
Special Scientific Report - Wildlife↗