The evaluation of mail and telephone techniques in snowballing studies
- Source:
- USDA
- Year:
- 1970
- Subject:
- Beekeepers, Snowball sampling, Mail surveys, Response rate, Telephone surveys, beekeepers, and surveys
- Language:
- English
- Collection:
- USDA publications
- Permanent URL:
- http://handle.nal.usda.gov/10113/30185