On the magnetic detectability of mesozoic ponta grossa arch dyke swarm: an integrated ground / airborne magnetometery and rock magnetism study - Ussami, Naomi; Ferreira, Francisco José Fonseca; Kolisnyk, Alexandre; Raposo, Maria Irene Bartolomeu; Molina, Eder Cassola; Ernesto, Márcia (International Dyke Conference, 1990)