Columbia subject headings:
Harvard subject headings:
Aviation medicine--Germany--History--20th century.
Aviation medicine--Research--Germany--Rechlin--History--20th century.
Aviation psychology--Germany--History--20th century.
Flight testing--Germany--Rechlin--History--20th century.
Germany. Luftwaffe.
Princeton subject headings:
Aviation medicine--Germany--History--20th century.
Aviation medicine--Research--Germany--Rechlin--History--20th century.
Aviation psychology--Germany--History--20th century.
Flight testing--Germany--Rechlin--History--20th century.
Germany. Luftwaffe