1 finding aid(s) found containing the word(s) Hellweg, Julius Frederick--Correspondence.

  1. George W. Mixter papers, 1855-1946

    45 items ; 4 containers ; 1.6 linear feet. -- Manuscript Division, Library of Congress, Washington, D.C.

    Summary:

    Navigation researcher and consulting engineer. Correspondence, writings, notes, lectures, ship’s papers, problem sets, calculations, maps, and other papers chiefly relating to Mixter’s contributions to the study of navigation.