Composition of Sample Households by Relationship to head of Family Classified by size of land Cultivated (Based on 20 per cent sample), Age and Marital Status, Scientific and Technical personnel-state tables, Classification by each branch and sub-branch of science or Technology, Type of Activity and marital status of persons in each branch of science or Technology, year of obtaining post-graduate Degree in physical sciences and Graduates and Doctorate Degrees in Engineering and Technology and selected branches of medicine.