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View Observations on the parasitism of Isaria farinosa (Dicks.) Fr. with special reference to the larch sawfly (Nematus erichsonii Hartig.) By Hans Theodor Güssow 
Observations on the parasitism of Isaria farinosa (Dicks.) Fr. with special reference to the larch sawfly (Nematus erichsonii Hartig.)
By Hans Theodor Güssow