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Heinrich, G M and Mgonja, M A (2002) Sorghum and Millet Improvement Program (SMIP) Midterm Review. International Sorghum and Millets Newsletter, 43. pp. 1-3.
Heinrich, G M (2001) Farmers in targeted area using a wider range of crop management options leading to increased productivity in Zimbabwe. International Sorghum and Millets Newsletter, 42. pp. 104-106.
Heinrich, G M (2000) Progress in SMIP intermediate result 1.2, increasing productivity. International Sorghum and Millets Newsletter, 41. pp. 9-10. ISSN 1023-487X
Heinrich, G M (1998) Technology Exchange in Phase III of SMIP. International Sorghum and Millets Newsletter, 39. pp. 53-63.