Imms, A.D. 1931a . Recent Advances in Entomology. P. Blakiston's Son Philadelphia 374 pp.
Notes: Insects discussed include San Jose scale, Eulecanium persicae, Coccus hesperidum, Pseudococcus nipae, P. filamentosus, pineapple mealybus, Icerya sp., Pseudococcus gahani, Saissetia oleae, Chrysomphalus aurantii, Lepidosaphes beckii, Diaspis pentagona, Eriococcus coriaceus, Asterolecanium variolosum, Dactylopius indicus, D. coccus and D. tomentosus.