TY  - BOOK
AU  - Helle,W.
AU  - Sabelis,M.
TI  - Spider mites: their biology, natural enemies and control 
SN  - 0444423729
PY  - 1985///
CY  - Amsterdam
PB  - Elsevier North-Holland
KW  - Tetranychidae
N1  - Includes bibliography and index
ER  -