By Sorell G.   Humphries M. J.   Bullock E.   Voorde M. Van de   in International Materials Reviews

ISSN:1743-2804|31|1|216-244

Maney Publishing‎(1986)‎

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By Montgomery M.J.   Sorell G.T.   in Journal of Adolescence

ISSN:0140-1971|21|6|677-689

Academic Press‎(1998)‎

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