1. Surv. of India Prof. Paper;Glennie,1932
2. United States magnetic tables and charts;Howe,1938
3. Magnetic vector study of regional and local geologic structure in principal oil states;Jenny;Trans. Soc. Petrol. Geophys.,1932
4. Geologic Interpretation of gravity anomalies in southern New England;Longwell;Bull. Geol. Soc. Amer.,1943
5. Gravimetric surveys of 1944 in New Brunswick;Miller,1946