Pika Pr

year of pub­li­ca­ti­onISBNauthor(s)title
1991978-0-9626772-0-5John W. EvansPowerful Rockey: The Blue Mountains and the Oregon Trail
  ''978-0-9626772-1-2John W. EvansPowerful Rockey: The Blue Mountains and the Oregon Trail
1990978-0-9626772-2-9John D. TrudelHigh Tech With Low Risk (Venturing Safely Into the 90s)