Subjects: History; International Geophysical Year, 1957-1958; Scientific expeditions--History--20th centuryHISTORY / Russia / General; HISTORY / Europe / Eastern; HISTORY / United States / General
Record details
Subjects: Research--History--19th century; Research--History--20th century; Science--Histoire--20e siecleSCIENCE / General; SCIENCE / History
Subjects: Space flight to the moonHISTORY / United States / 20th Century; SCIENCE / History
Subjects: Ocean and civilization; Oceanography--International cooperation--History; Oceanography--HistorySCIENCE / Earth Sciences / Oceanography; SCIENCE / History; SCIENCE / Philosophy & Social Aspects
Subjects: Regional planning--Sudan--Gezira (Region)--History; Agriculture and state--Sudan--Gezira (Region)--History; Irrigation--Sudan--Gezira (Region)--HistoryHISTORY / Africa / General; HISTORY / General; HISTORY / Africa / North