Grounded theory methodology received its first systematic formulation in Barney Glaser and Anselm Strauss, The Discovery of Grounded Theory (Chicago: Aldine, 1967). The general approach is developed in progressively more detail in Glaser, Theoretical Sensitivity (Mill Valley: Sociology Press, 1978), and in
Strauss, Qualitative Analysis for Social Scientists (Cambridge: Cambridge University Press, 1987). The most detailed specification of grounded theory procedures is presented in Anselm Strauss and Juliet
Corbin, Basics of Qualitative Research (Newbury Park: Sage, 1990).
2 . Derek Layder, New Strategies in Social Research (Cambridge: Polity Press, 1993), selectively incorporates ideas from grounded theory and Mertonian theory testing into a broadly realist methodology for social science research.