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Awadhwal, N K and Thierstein, G E (1983) Development of Rolling-Type Soil Crust Breaker. Agricultural Mechanization in Asia, Africa and Latin America, 14 (4). pp. 31-34. ISSN 0084-5841
Awadhwal, N K and Thierstein, G E (1985) Soil crust and its impact on crop establishment: A review. Soil & Tillage Research, 5 (3). pp. 289-302. ISSN 0167-1987