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<p>Bibliography: p. 19-20
</p>
<br>Subjects: Aerial spraying and dusting in forestry; Douglas-fir tussock moth Control; Bluebirds Effect of pesticides on; Wrens Effect of pesticides on</div>
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<dl><dd>Thomas, Jack Ward. cn</dd>
<dd>McCluskey, D. Cal</dd></dl></div>
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