Weber, G., 
1953. The macrofauna of light and heavy arable soils and the 
effect on them of plant-protection substances. JZeitschrift 
fur Pflanzenernahrung, Dungung und Bodenkunde (Berlin) 61: 
107-118. (from Satchell, 1955). 

20 INT.DUP. ,D.C.64= wil 1i 
