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1. Successful focus groups : advancing the state of the art / ed. lit. David L. Morgan Monografia Publication Newbury Park : Sage, 1993 Description XV, 271 p. ; 22 cm LocationBiblioteca Egas Moniz Availability Available (2). Reference (1).

2. Future directions for focus groups / David L. Morgan Analítico Availability No copies available

3. When to use focus groups and why / David L. Morgan, Richard A. Krueger Analítico Availability No copies available