{"id":"000986680","type":"book","title":"Secular variations of the Earth's magnetic field during the last two interglacial periods","publisher":"G. Fischer","publisher-place":"Stuttgart","pages":"31-35","container-title":"Klimageschichtliche Probleme der letzten 130 : 000 Jahre","author":[{"family":"Koči","given":"Alois"}],"issued":{"raw":"1991"}}