The Diary of a U-boat Commander With an Introduction and Explanatory Notes by EtienneEbookThe Diary of a U-boat Commander With an Introduction and Explanatory Notes by EtiennebyFrank H. (Frank Henry) MasonRating: 0 out of 5 stars0 ratingsSave The Diary of a U-boat Commander With an Introduction and Explanatory Notes by Etienne for later