Björkqvist, S.E., and Jalander, B. (1970). 'Huumausaineiden käyttö Turun koulunuorison keskuudessa'. Moniste. ('Drug Use among Adolescents in Turku Schools.' Duplicated Folkhälsan , Mannerheimin Lastensuojeluliitto.
2.
Brun-Gulbrandsen. S., and Bergersen Lind, B. (1970). 'Marihuana og hasjisj.'Holdninger og bruk.Oslo .
3.
Hemminki. E.Rissanen, A. and Mattila, A. (1971). 'Huumausaineiden käyttö Helsingin koulunuorison keskuudessa, 1970,' Kartoittava osa. (Drug Use Among Schoolchildren in Helsinki 1970, incidence.)J. Soc. Med., 3, 152-156.
4.
Hemminki, E.Rissanen, A. and Mattila, A.'Drug Use Among Schoolchildren in Helsinki, 1970.' (In preparation.)
5.
WHO Expert Committee on Drug Dependence— 17th report ( 1970). World Health OrganizationTechnical Report Series No. 437. Geneva.
6.
Wright, J.D. (1968). 'A Survey of the Knowledge and Attitudes about Drug Misuse among Fourth Year Pupils at Three Wolverhampton Schools.'The Health Education Journal, 27, 3.