1. The adoption of high-yielding grain varities in developing nations;Dalrymple;Agricultural History,1979
2. Investment in international agricultural research: some economic dimensions;Scobie,1979
3. Costs and Benefits of Agricultural Rwsearch: The State of the Arts;Schuh,1979
4. Sources of innovation in agricultural technology;Biggs;World Development,1981
5. Institutions and decision-making in agricultural research;Biggs,1982