1. Field survey of large farmers in the Pakistan Punjab;Ahmed;Harvard University's Project on Rural Development in Pakistan, Working Paper No. 7,1972
2. The economics of mechanisation in Pakistan;Ahmed;Harvard University's Project on Rural Development in Pakistan, Working Paper No. 8,1972
3. The Green Revolution and tractorisation: Their mutual relations and socio-economic effects;Ahmed;Inter. Lab. Rev.,1976
4. The Green Revolution: A rejoinder;Ahmed;Inter. Lab. Rev.,1977
5. Agricultural technology and the distribution of welfare gains;Bieri;Amer. Jour. of Agri. Econ.,1972