Grace, P. R., M. C. Jain, L. W. Harrington, and G. P. Robertson. 2003. Long-term sustainability of the tropical and subtropical rice and wheat system: An environmental perspective. Pages 27-43 in J. K. Ladha, J. E. Hill, J. M. Duxbury, R. K. Gupta, and R. J. Buresh, eds. Improving the Productivity and Sustainability of Rice-Wheat System: Issues and Impacts. American Society of Agronomy Special Publication 65, Madison, Wisconsin, USA.
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