This document, Terrain Handbook 38, is a classified military intelligence report prepared by the Allied Geographical Section (AGS) of the Southwest Pacific Area (SWPA), operating under the direction of General Douglas MacArthur. Dated October 27, 1944, this handbook is one of the most strategically significant in the series, as it focuses on the Lingayen Gulf area in Northwestern Luzon.
Terrain handbook 38: Lingayen (Philippine series)
