| 1 | L R Brown. Who will feed China? World Watch, 1994 (9): 10−19 | 
 
																														
															| 2 | D Koppen. Supplying the world population with food energy from arable land. Berichte Uber Landwirtschaft, 1999, 77(3): 333−344 | 
 
																														
															| 3 | United States Census Bureau (USCB). Available at USCB website on February 10, 2014 | 
 
																														
															| 4 | United States Department of Agriculture (USDA). Available at USCB website on February 10, 2014 | 
 
																														
															| 5 | Food and Agriculture Organization of the United Nations (FAO). FAOSTAT. Available at FAO website on February 10, 2014 | 
 
																														
															| 6 | Food and Agriculture Organization of the United Nations (FAO). Available at FAO website on February 10, 2014 | 
 
																														
															| 7 | Chinese Academy of Engineering (CAE). Available at CAE website on February 10, 2014 | 
 
																														
															| 8 | China Agricultural University (CAU). Available at CAU website on February 10, 2014 | 
 
																														
															| 9 | Higher Education Press (HEP). Available at HEP website on February 10, 2014 |