John Dillon
Editorial
Jean Bosco Harelimana
Artigo de Pesquisa
Johannes Routila and Jukka Westermarck
S Nilsson, P Hyllengren, A Ohlsson, K Kallenberg, G Waaler and G Larsson
AT Tyowua, SG Yiase, RA Wuanna
Xingmin Zhang *