TY  - RPRT
TI  - Variations in magnetic intensity and climatic changes.
AU  - G Wollin
AU  - D B Ericson
AU  - W B Ryan
PY  - 1971
DO  - 10.1038/232549a0
UR  - https://pubmed.ncbi.nlm.nih.gov/16063098/
ID  - 16063098
ER  -