1. Studies of the balsam woolly aphid, Adelges piceae (Ratz.) (Homoptera: Phylloxeridae) and its effect on balsam fir, Abies balsamea (L.);Balch;Miscl. Publs. Can. Dep. Agr.,1952
2. Adelges cooleyi Gillette (Hemiptera: Adelgidae) of the Douglas fir in Britain: completion of its life cycle;Cameron;Ann. appl. Biol.,1936
3. Conifer woolly aphids (Adelgidae) in Britain;Carter;Bull. For. Comm. Lond.,1971
4. Flight activity of alate Adelgids (Homoptera: Aphidoidea) in Southern England;Carter;Bull. ent. Res.,1973
5. The Douglas fir Chermes (Chermes cooleyi);Chrystal;Bull. For. Comm. Lond.,1922