Original: Page 18 and footnote 35 that cites Ludwig Gelberg, The Warsaw Treaty of 1970 and the Western Boundary of Poland, at 125–127; Jochen Abr.
Simplified: Page 18 and footnote 35 that cites Ludwig Gelberg, The Warsaw Treaty of 1970 and the Western Boundary of Poland, at 125-127; Jochen Abr.