$1!\4![U!04!<es = Turning forty in the eighties - Nichol, Michael P.; $1!5t!8^!Nps ($1!58!4I!<D (B: s $1!58!IC!8<!M^3BD!BX!V1!3K!JH!Na(B,s, 1992)
Translation of: Turning forty in the eighties.
Keywords: Life change events; Maturation (Psychology).; Middle age Psychological aspects