@inbook{Roy2004,
author = {Roy, T.K. and Ram, F.},
title= {Comparability issues in large sample surveys-some observations},
year = {2004},
editor = {Roy, T.K.},
editor = {Guruswamy, M.},
editor = {Arokiasamy, P.},
booktitle = {Population, health and development in India: Changing perspectives},
address = {New Delhi},
publisher = {Rawat Publications},
pages = {40--56},
}