Dalton Lawrence Rasmussen should be given a key to the city for this detailed and encyclopedic compendium of Colorado underground music of the late '70s. Tracking down the songs and having them remastered took Rasmussen years, but all his effort paid off. The availability of Rocky Mountain Low on vinyl salutes an era when you could listen to these songs only in that format, and the companion booklet, with photographs, fliers and contemporary accounts of the scene, is an invaluable resource for anyone curious about a largely lost history of the counterculture in Denver and beyond.