Recommended methods for testing opium, morphine and heroin manual for use by national narcotics laboratories / [[Book] :]
United Nations.
- New York : United Nations, 1986.
- 71 p. : ill. ; 24 cm.
Issued also in French under title: Méthodes recommandées pour l'identification de la cocaïne. "ST/NAR/7"--T.p. verso.