MEASURING SOCIAL CAPITAL: AN INTEGRATED QUESTIONNAIRE / GROOTAERT, Christiaan ; NARAYAN, Deepa ; NYHAN JONES, Veronica ; WOOLCOCH, Michael .- Washington: BM. World Bank , 2003 .- 1vol; 53pp; 25cms .-(World Bank Working Paper; 18) .- ISBN 0-8213-5661-5 .-