"History, state and geopolitics; natural space: risks and usage; population and society; settlement and urbanisation; economic, transformation and development" - Umschlag
Enth. 7 Fibeln: Rayas, 1, 1952. Catón moderno por Edelvives, 1946. Mi cartilla, 4, 7. ed. 1962. Primer libro, 1954. El primer libro escolar, 1, 8. ed. 1942. Mi cartilla, 2, 8. ed. 1962. Mi sendero, 6. ed. 1943