1. Some Attributes of Online Search Intermediaries that Relate to Search Outcome. Ph.D. dissertation, Drexel University, Philadelph Ph.D. dissertation, Drexel University, Philadelphia, PA, 1984.
2. ; ; Evaluation of the Online Process. Santa Monica, CA: Cuadra Associates; 1980. (PB 81-132565)
3. Online searching: Measures that discriminate among users with different types of experiences
4. Modeling and Evaluation of On-line User Behavior; Final Report to the National Library of Medicine. OCLC; 1981
5. A state transition analysis of online information-seeking behavior