H. Mark Hildebrandt of Ann Arbor offers a wealth of experience and knowledge about electric railway, or traction, lines. Over his lifetime, he has collected countless photographs a...vizualizați mai multeH. Mark Hildebrandt of Ann Arbor offers a wealth of experience and knowledge about electric railway, or traction, lines. Over his lifetime, he has collected countless photographs and memorabilia concerning both steam and electric rail systems. Martha A. Churchill is an attorney in Milan. She has written numerous articles and columns for publication and has traveled on subways all around the world.vizualizați mai puține