Lord, H.V.S. 1922 Care of shade trees: requirements, diseases, insects and their control, and tree surgery.. Altoona Mirror August 26: 77 pp.

Notes: Scale species mentioned include Pulvinaria vitis, Gossyparia spuria, Chrysomphalus tenebricosus, C. obscurus, Lepidosaphes ulmi, Aspidiotus ancylus, A. perniciosus, Aulacaspis rosae, Lecanium nigrofasciatum and Toumeyella eriodendri.