Snowball sampling

BMJ 2013 / 12 Vol. 347; Iss. dec20 2

Snowball sampling

Sedgwick, P.
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Volume:
347
Language:
english
Journal:
BMJ
DOI:
10.1136/bmj.f7511
Date:
December, 2013
File:
PDF, 184 KB
english, 2013
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