Vols. for 19 -<1980> distributed to depository libraries in microfiche.
Vols. for 1924/25-1931/32 issued by the Bureau of Navigation (Dept. of Commerce); 1932/33-1942 by the Bureau of Marine Inspection and Navigation; 1943-1966 by the Bureau of Customs; 1968- by the U.S. Coast Guard.