Helvetica and the New York City subway system the true (maybe) story - Shaw, Paul (Cambridge, Mass. MIT Press, 2011)
Introduction -- The labyrinth -- Bringing order out of chaos -- Transportation signage systems in the 1960s -- The New York City Transit Authority and Unimark International -- The myth of the Helvetica juggernaut -- Standard, Helvetica, and the New York City subway system -- The fate of the Unimark system -- Helvetica infiltrates the New York City subway system -- Helvetica triumphant : the subway system today -- Chronology.
Includes bibliographical references (pages 127-129).
Keywords: Helvetica type -- New York (State) -- New York; Subways -- New York (State) -- New York; Signs and signboards -- New York (State) -- New York -- Lettering