Seasonal damage by insects and squirrels to female reproductive structures of black spruce, Picea mariana (Mill.) B.S.P.
Prévost, Y.H.; Laing, J.E.; Haavisto, V.F.
Catalog ID: 22265
Great Lakes Forestry Centre
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A study of Balustium putmani (Acarina: Erythraeidae) in apple orchards in southern Ontario.
Cadogan, B.L.; Laing, J.E.
Catalog ID: 21591
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