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Sapra, Katherine J., Natalie D. Crawford, Abby E. Rudolph, Kandice C. Jones, Ebele O. Benjamin, und Crystal M. Fuller. Social Network Members’ Roles and Use of Mental Health Services Among Drug Users in New York City. 2013.

Sapra, Katherine J., et al. Social Network Members’ Roles and Use of Mental Health Services Among Drug Users in New York City. 2013.