About: snowball sampling

Premodifier: snowball
Head noun: sampling

Same concepts
http://dbpedia.org/resource/Snowball_sampling

Broader concepts

label	provenance	confidence
method	isap:485470242	0.601424
technique	isap:184041111	0.435819

Narrower concepts

label	provenance	confidence
population	isap:283713394	0.147604