BioStor
 | The mealy-bugs (Pseudococcidae: Homoptera) described by W. J. Hall, F. Laing and A. H. Strickland from the Ethiopian Region D J Williams (1958) Bull Brit Mus [Nat Hist] Ent 7: 1-37 |
 | The British Pseudococcidae (Homoptera: Coccoidea) D J Williams (1962) Bulletin of the British Museum (Natural History) (Entomology) 12(1): 1-79 |