By Hao J.M.   Zhou L.   Chan C.T.   in Applied Physics A

ISSN:0947-8396|87|2|281-284

Springer Publishing Company ‎(2007)‎

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By Zhang C. -D.   Wu X. -P.   Hao J. -M.   He H. -B.   Zhao D. -M.   in Journal of Geodesy

ISSN:0949-7714|78|3|192-200

Springer Publishing Company ‎(2004)‎

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