Kettela, E. G.

A cartographic history of spruce budworm defoliation from 1967 to 1981 in eastern North America / by E.G. Kettela = Historique en cartes de la défoliation causée par la tordeuse des bourgeons de l'épinette dans l'est de l'Amérique du Nord de 1967 à 1981 / par E.G. Kettela.  Ottawa : Canadian Forestry Service = Service canadien des forêts, 1983. iv, 8 pages : illustrations, maps some copies; 28 cm.

Guidelines for predicting tree mortality caused by the spruce budworm, and measures for reducing losses Hull, Quebec : Environment Canada, Canadian Forestry Service, 1982-. 1 folded sheet.

May, Elizabeth

Budworm battles : the fight to stop the aerial insecticide spraying of the forests of eastern Canada / by Elizabeth May ; edited by Richard Rogers.  1st ed. May 1982. Tantallon : Four East Publications, 1982. 139 pages ; 23 cm.

Ecological impacts of the budworm-killed forest : report to Environment Canada Environmental Protection Service Canada : P. Lane and Associates, 1985. viii, 185 pages : illustrations ; 29 cm.