The national parks /
Freeman Tilden ; foreword by George B. Hartzog, Jr.
- rev. & enlarg. ed. of the classic book of the national parks, with new information & evaluation on all of the national parks, national monuments, & historic sites
- New York : Alfred A. Knopf, 1970.
- xviii, 584 p. : il.
Parques nacionais e reservas--Estados Unidos--Guias.