Major & Mrs HoltÍs Battlefield Guide to Ypres Salient and Passchendaele - Major Holt, Mrs. Valmai Holt - Google Books

https://books.google.de/books?id=6PVsBQAAQBAJ&pg=PA220&lpg=PA220&dq=Lettenberg+79+m&source=bl&ots=XSbjCWaNBN&sig=bFHqncoUjgPosw5

This is the most complete guide to the First World War Battlefield of Ypres that has ever been published. Tonie and Valmai Holt, have condensed the knowledge gained from almost a quarter of a century of researching, writing about, visiting and conducting…