Welch , S. M <br/><br/>
The design of biological monitoring systems for pest management / 
S.M. Welch and B.A Croft 
 - Wageningen :  Center for Agricultural Pub. and Documentation ,  1979 
 - 77 p. :  ill . ;  21 cm . 
 - Simulation monographs .
<br/><br/>References : p.72-76 
<br/><br/><label>ISBN: </label>9022006875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pests--Biological control--Mathematical models<br/>Pests--Control--Mathematical models