Sykes, Godfrey Delta, estuary, and lower portion of the channel of the Colorado River : 1933 to 1935. - Washington : Carnegie Institution, 1937. - 70 p. : il. ; 25,5 cm Subjects--Topical Terms: HidrogeologíaDeltaEstuario Subjects--Geographic Terms: Río Colorado Index Terms--Genre/Form: Libro Universal Decimal Class. No.: 556.54