"PSYCHOLOGY / Mental Health" . . . . . . . . "Cross-cultural studies" . "Friendships cultural variations, developmental issues and impact on health" . . . . . "Electronic books" . . . "Friendships : cultural variations, developmental issues and impact on health" . . . . . . . "Wohlbefinden." . . "Freundschaft." . . "Soziales Netzwerk." . . "Kulturvergleich." . . . . "Gesundheit." . .