Glaser, Barney G. The discovery of grounded theory : Strategies for qualitative research / Barney G. Glaser, Anselm L. Strauss. - London : Weidenfeld and Nicolson, 1968. - xiii, 271 p. 22 cm. - Observations . Bibliographical footnotes. ISBN: 0297763180 Subjects--Topical Terms: Ground theory.Sociology--ResearchSociology