Steijn, P. v. (1989). AIDS, a combined environmental and systems approach: Edited by Pieter van Steijn. Swets & Zeitlinger.

Steijn, Pieter van. AIDS, a Combined Environmental and Systems Approach: Edited by Pieter Van Steijn. Amsterdam [u.a.]: Swets & Zeitlinger, 1989.

Steijn, Pieter van. AIDS, a Combined Environmental and Systems Approach: Edited by Pieter Van Steijn. Swets & Zeitlinger, 1989.