@inbook{Eckstein1975,
author = {Eckstein, H.},
title= {Case studies and theory in political science},
year = {1975},
editor = {Greenstein, F.I.},
editor = {Polsby, N.W. },
booktitle = {Political science: Scope and theory},
address = {Reading, MA},
publisher = {Addison-Wesley},
pages = {94--137},
}