1. The cohort as a concept in the study of social change;Ryder;Am. sociol. Rev.,1965
2. Situated actions and vocabularies of motive;Mills;Am. sociol. Rev.,1940
3. Mistakes at work;Hughes;Can. J. Econ. polit. Sci.,1951
4. License and mandate;Hughes,1958
5. Advice, control and mandates within professions;Daniels;Problems of Social Change and Control in Professions,1971