Columbia subject headings:
Middle-aged men--Interviews.
Middle-aged men--Psychology--Case studies.
Work--Psychological aspects--Case studies.
Harvard subject headings:
Middle-aged men--Interviews.
Middle-aged men--Psychology--Case studies.
Work--Psychological aspects--Case studies.
Princeton subject headings:
Middle-aged men--Interviews.
Middle-aged men--Psychology--Case studies.
Work--Psychological aspects--Case studies.