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1Subjects: “...Gypsy moth United States....”
Government Document Book -
2
Government Document Book -
3by Campbell, Robert W.Subjects: “...Douglas fir tussock moth Bibliography....”
Published 1978
Government Document Book -
4Published 1978Subjects: “...Gypsy moth United States Bibliography....”
Government Document Book -
5by Campbell, Robert W.Subjects: “...Gypsy moth Biological control New England....”
Published 1977
Book -
6