Orgnic farming
Science
.
1981 Aug 14;213(4509):710-2.
doi: 10.1126/science.213.4509.710-a.
Authors
W Lockeretz
,
D H Kohl
,
G Shearer
PMID:
17834563
DOI:
10.1126/science.213.4509.710-a
No abstract available