1. A Method of Computing the Effectiveness of an Insecticide
2. T. Armstrong(1947 ). Report on acaricide investigations, 1947. Part II. Greenhouse and insectary experiments with the European red mite ,Paratetranychus pilosus(C. & F.) and the two-spotted mite,Tetranychus bimaculatusHarvey.Processed Publ. Dep. Agric. Canada, Div. Ent.pp.1 -17 .