TY  - RPRT
TI  - Magnetic declination in the United States; epoch 1980
AU  - E.B. Fabiano
AU  - N.W. Peddie
PY  - 1981
DO  - 10.3133/i1283
UR  - https://pubs.usgs.gov/publication/i1283
ID  - i1283
ER  -