1. ALLAN, D. W., PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY-MATHEMATICAL AND PHYSICAL SCIENCES 62: 783 (1966).
2. Lectures on Rock Magnetism 1956
3. Blackett P. M. S. paper presented at the N.A.T.O. Advanced Study Institute on "Planetary Magnetic Fields" held at Newcastle in April (1965).
4. A Symposium on Continental Drift 1965
5. BULLARD, E.C., THE WESTWARD DRIFT OF THE EARTHS MAGNETIC FIELD, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES 243: 67 (1950).