BIRÓ, P. DIE VERTIKALEN ERDKRUSTENBEWEGUNGEN UND SÄKULARVARIATIONEN DES ERDSCHWEREFELDES. Periodica Polytechnica Civil Engineering, [S. l.], v. 16, n. 1-2, p. 3–9, 1972. Disponível em: https://pp.bme.hu/ci/article/view/4264. Acesso em: 19 may. 2024.