1. found regarding this topic was from,1973
2. Therefore, a more recent search was undertaken by performing a library computer-assisted search of the keywords: research, research design, experimentation, experimental design and methodology. An extensive list of texts and journal articles was elicited
3. 248 pgs Contains basic information for the beginner, with special emphasis on rating scales and the process of writing one's first paper. This text will not offer information beyond the social sciences;0,1989
4. Fundamentals of Clinical Trials PSG Publishing Company;L., Friedman; C., Furberg; D, DeMets,1985
5. Bibliography on Experiment and Treatment Design Hafner Publishing,1973