Signals at level crossings : report of the special committee : adopted by the Advisory Committee for Communications and Transit (nineteenth session, November 1935).
League of Nations.Advisory and Technical Committee for Communications and Transit.Special Mixed Committee for Additional Signals at Level Crossings.
[Geneva : League of Nations,
1936].
"C.L.46.1936.VIII.-Annex."
At head of title: Geneva, May 14th, 1935. League of Nations.
Traffic signs and signals.
Railroad crossings.