Links
[1] http://polsci.umass.edu/people/faculty/frederic-schaffer/associations
[2] https://connect.apsanet.org/interpretationandmethod/
[3] http://www.concepts-methods.org/
[4] https://www.maxwell.syr.edu/research/center-for-qualitative-and-multi-method-inquiry/institute-for-qualitative-multi-method-research/modules