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Published 1948
"1935 Report on Lake Tsana outlet control works and Ethiopian highways from Addis Ababa to Lake Tsana /

: 176 pages : plates ; 34 cm.

Published 1947
Report on Lake Tsana outlet control works and Ethiopian highways from Addis Ababa to Lake Tsana /

: 152 pages : plates ; 34 cm.

Playas and dried lakes : occurrence and development /

: xv, 411 pages : illustrations ; 26 cm. : Includes bibliographical references and indexes.