Ethnographic Strategies in the Tracking and Retention of Street-Recruited Community-Based Samples of Substance Using Hidden Populations in Longitudinal Studies

Author: Cepeda Alice   Valdez Avelardo  

Publisher: Informa Healthcare

ISSN: 1082-6084

Source: Substance Use & Misuse, Vol.45, Iss.5, 2010-03, pp. : 700-716

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