註記   條目
Hydrogeology -- Statistical methods   3
Hydrogeology -- Turkey : Gunay, Gultekin,  2022 1
Hydrographic surveying -- Atlantic Coast (U.S.) : United States.  1817 1
Hydrographic surveying -- Chesapeake Bay (Md. and Va.)   2
Hydrographic surveying -- Early works to 1800   2
Hydrographic surveying -- History : Schmieder, Robert William,  2019 1
Hydrographic surveying -- North Carolina : United States.  1807 1
Hydrographic surveying -- United States   10
Hydrography : Daponte, Pasquale,  2022 1
Hydrography -- Atlantic Ocean   2
Hydrography -- Chesapeake Bay (Md. and Va.) : United States.  1817 1
Hydrography -- Congo River -- History : Van Pul, Paul,  2023 1

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