Olympus Press / The Trailmaster

year of pub­li­ca­ti­onISBNauthor(s)title
2006978-0-9786575-0-5John McKinneyLos Angeles County, A Day Hiker's Guide
2009978-0-9786575-1-2John McKinneyOrange County, A Day Hiker's Guide
  ''978-0-9786575-2-9   ''Southern California, A Day Hiker's Guide