1. Various technical information on recording current meter models 4 and 5;Aanderaa Instruments;Leaflet No. 101,1974
2. Ferromagnetism;Bozorth,1951
3. Introduction to magnetic materials;Cullity,1972
4. Sources of compass-error within the Aanderaa recording current meter;Keenan;BIO Report Series, BI-R-76-2,1976
5. A treatise on the mathematical theory of elasticity;Love,1927