Snowball Sampling: Problems and Techniques of Chain Referral Sampling
Snowball Sampling: Problems and Techniques of Chain Referral Sampling
P. Biernacki,D. Waldorf
1981 · DOI: 10.1177/004912418101000205
5,333 Citations
Snowball Sampling: Problems and Techniques of Chain Referral Sampling
P. Biernacki,D. Waldorf