1913 map of the Lehigh Valley Transit Company and connecting lines
Unknown author<span style="display: none;">Unknown author</span>
"McGraw Electric Railway Manual: The Red Book of American Electric Railway Investments" via <a rel="nofollow" class="external text" href="http://www.lib.utexas.edu/maps/mcgraw_electric.html">McGraw Electric Railway Manual Maps, 1913</a> at University of Texas Libraries