Argentine Central Books/Documents

Does anyone know where I might look to find books and other information, photographs, documents on the Argentine Central? I recently ran across a book in my high school library titled The Argentine Central by Frank R. Hollenback, copyright 1959. The copy is in fair shape, with only a small amount of damage for its age. I find the book very interesting, and am now greatly intrigued by this narrow gauge line. I also found the book titled Stairway To The Stars by Dan Abbott, copyright 1977. This book looks really good, but I'm not sure where to look for it. Thanks for any assistance that can be given.
Shane