TY  - BOOK
AU  - W. Helle
AU  -  M.W. Sabelis, 
TI  - Spider mites their biology, natural enemies and control. Vol 1 A 
SN  - 0-444-42372-9
U1  - 632.6542 
PY  - 1985///
CY  - Oxford
PB  - Elsevier Science Publishers
N1  - W. Helle & M.W. Sabelis: Spider mites their biology, natural enemies and control. Vol 1 A.  Oxford.  Elsevier Science Publishers, 1985. 0-444-42372-9--(632.6542HEL)
ER  -