1. Adoption behavior in family farm systems;Abd-Ella;Rural Sociol.,1982
2. Factors affecting farmers' adoption of conservation tillage;Bultena;J. Soil Water Conserv.,1983
3. The farmer and erosion: factors influencing the use of control practices;Carlson,1980
4. A procedure for conducting mail surveys with the general public;Christenson;J. Community Dev. Soc.,1975
5. Mail and Telephone Surveys: the Total Design Method;Dillman,1978