Algunas conjeturas acerca de geografía histórica de Guipúzcoa

Study of the geography of Gipuzkoa throughout the history. The evolution of the estuaries was in three stages: deep estuaries (Paleolithic), shallow estuaries (Neolithic) and the formation of swamps and marshes ; this evolution had an influence on the way of life of the population. The history of Gipuzkoa is also studied