Pesticides and nitrogen cycle. Vol 2 - Rup Lal; Sukanya Lal (Boca Raton CRS Press Inc, 1988)
Rup Lal & Sukanya Lal: Pesticides and nitrogen cycle. Vol 2. Boca Raton. CRS Press Inc, 1988. 0-8493-4352-6--(589.95LAL)
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