TY  - BOOK
AU  - Hodson, A. C.
AU  - Lofgren, J. A.
TI  - Recognition and control of scale insects on trees & shrubs
CY  - St. Anthony Park, Minn.
PB  -  Agricultural Extension Service
KW  - Lecanium  Olmo
KW  -  Plagas  Arboles frutales
KW  -  Plagas
ER  -