@inbook{de Vries1990, author = {de Vries, J. }, title= {Problems in the measurement, description and analysis of historical urbanization}, year = {1990}, editor = {Van Der Woude, A.M.}, editor = {Hayami, A.}, editor = {de Vries, J. }, booktitle = {Urbanization in history: A process of dynamic interactions}, address = {Oxford}, publisher = {Clarendon Press}, pages = {43--73}, }