Roach R, Berdahl LY. Lessons From the Field: Surveying Hard-to-Reach Populations: Response to Boychuk’s Critique. CRSP/RCPS [Internet]. 1999 May 1 [cited 2024 Nov. 23];(43). Available from: https://crsp.journals.yorku.ca/index.php/crsp/article/view/33563