by Campbell, Ian D, 1990 [author] | Glen Williams, 1990 [joint author].
by Williams, Glen, 1996 [author] | Nassali Tamale, 1996 [joint author].
by Sittitrai, Werasit, 1995 [author] | Glen Williams, 1995 [joint author].
by Mukoyogo, Christian, 1991 [author] | Glen Williams, 1991 [joint author].