por Strahler, Arthur Newell, 1918- [autor] | Sunyer, Pere [traductor] | Barrutia, Marta [traductor] | Strahler, Alan H [autor] | Strahler, Arthur Newell, 1918-. Modern physical geography.
por Case, Earl Clark, 1887- [autor] | Bergsmark, Daniel Rockman, 1898-1945 [autor].
por Gregory, James Stothert, nacimiento 1912 [autor] | Shave, Donal William [autor] | Ruiz Ubirico, Jose [traductor].