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2. Nomenclature of oleiferous brassicas cultivated in Punjab;Alam;Indian J. Agr. Sci.,1945
3. Early cultivated plants in India and Pakistan;Allchin,1969
4. Species identification of cultivated brassicas with isozyme electroforesis;Arús;Cruciferae Newsl.,1987
5. Collecting in Ethiopia;Astley;Cruciferae Newsl.,1982