Columbia subject headings:
Harvard subject headings:
Atomic bomb--Germany--History--20th century.
Atomic bomb--Germany--Remote sensing--History--20th century.
Germany--Remote-sensing images.
Ground penetrating radar.
Nuclear weapons--Germany--History--20th century.
Nuclear weapons--Germany--Remote sensing--History--20th century.
Princeton subject headings:
Atomic bomb--Germany--History--20th century.
Atomic bomb--Germany--Remote sensing--History--20th century.
Germany--Remote-sensing images.
Ground penetrating radar.
Nuclear weapons--Germany--History--20th century.
Nuclear weapons--Germany--Remote sensing--History--20th century.
Remote-sensing images.