Mnenija za nestopanskite organizacii v Bălgarija, dekemvri 1996 (Centăr za izsledvane na demokracijata, 1996)
A representative national survey was conducted by Vitosha Research in the month of December 1996 with the aim of registering popular attitudes to NGOs in Bulgaria. It was conducted between 1-14 December, 1996 by the personal interview method with the participation of 1,561 respondents aged over 18. Two-stage cluster sampling was used. In the first stage 250 constituencies (clusters) were randomly selected from the list of constituencies in the last parliamentary elections of 1994, and the second stage consisted in randomly selecting 7 respondents out of each cluster. The sample included 176 clusters in towns and cities and 74 clusters in villages