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Significance of lead residues in mallard tissues
Patuxent Wildlife Research Center.
1974
Toxicity of lead and proposed substitute shot to mallards
Fish and wildlife issues related to the use of lead fishing gear
Patricia J. Michael
2006
Use of lead shot for hunting migratory birds in the United States
1986
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U.S. Fish and Wildlife Service. Region 6
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Interpretation of criteria commonly used to determine lead poisoning problem areas
Milton Friend
1985
