TY - BOOK T1 - Directions for magnetic measurements A1 - Hazard, Daniel L. LA - English PP - Washington PB - Government Printing YR - 1911 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/das.4165 OP - 131 KW - GeologĂ­a y GeofĂ­sica Aplicadas KW - Geomagnetismo ER -