BiblioVault may have an electronic file which would meet your requirements for this title:
Trails for the Twenty-First Century: Planning, Design, and Management Manual for Multi-Use Trails
Charles Flink, Kristine Olka, Robert Searns, Robert Rails to Trails Conservancy and David Burwell
Paper: 978-1-55963-819-7
Electronic: 978-1-59726-346-7