1996, 1st edition. Penrhyndeudraeth: Awdurdod Parc Cenedlaethol Eryri. Previous owner's signature. Near fine paperback copy; edges very slightly dust-dulled and nicked. Remains particularly well-preserved overall; tight, bright, and clean. Physical description: 56 pages: illustrations (some color); 28 cm. Subjects: Aerial photography in archaeology -- Wales -- Snowdonia. Archaeology -- Wales.....