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U.S. DEPARTMENT OF COMMERCE 
CHARLES SAWYER, Secretary 
COAST AND GEODETIC SURVEY 
ROBERT F. A. STUDDS, Director 
Special Publication No. 135 
Revised (1951) Edition 
TIDAL DATUM 
PLANES 
By 
H. A. MARMER 
Assistant Chief, Division of Tides and Currents 
U. S. Coast and Geodetic Survey 
UNITED STATES 
GOVERNMENT PRINTING OFFICE 
WASHINGTON : 1951 
For sale by the Superintendent of Documents, U. S. Government Printing Office 
Washington 25,D.C. - Price 60 cents 
