1. Statistical analysis of qualitative variation;Alan,1977
2. Theta reliablity and factor scaling;Armor,1974
3. Family and Social Networks: Roles, Norms and External Relationships in Ordinary Urban Families;Bott,1971
4. Network items and the General Social Survey;Burt;Social Networks,1984
5. General Social Survey, 1972–1986: Cumulative Codebook;Davis,1986