Columbia subject headings:
Bohr, Niels, 1885-1962.
Einstein, Albert, 1879-1955.
Physics--History.
Quantum theory.
Relativity (Physics)
Harvard subject headings:
Bohr, Niels, 1885-1962.
Einstein, Albert, 1879-1955
Physics--History.
Quantum theory.
Relativity (Physics)
Princeton subject headings:
Bohr, Niels, 1885-1962.
Einstein, Albert, 1879-1955.
Physics--History.
Quantum theory.
Relativity (Physics)