References
- Brown , L.R. , Flavin , C. and Postel , S. 1991 . Saving the planet: How to shape an environmentally sustainable global economy , WorldWatch Environmental Alert Series Edited by: Stake , Linda . New York : W.W. Norton & Co. .
- Dye , L. 1993 . Methanol is embraced as crop aid . Los Angeles Times , A‐1 April 4 (Original report was in Proc. Nat. Acad. Sci. Oct., 1992)
- Robinson , E. 1993 . U.S. farms keeping lead may key trade successes . California‐Arizona Farm Press , 15 (7) April 3 : 2 – 3 . 1993