TY  - RPRT
TI  - Secular polar motion observed by GRACE
AU  - Ki-Weon Seo
AU  - Jae-Seung Kim
AU  - Kookhyoun Youm
AU  - Jianli Chen
AU  - Clark R. Wilson
UR  - https://ntrs.nasa.gov/citations/22664923713090
ID  - 22664923713090
ER  -