共 7 条
[5]
Arctic[P]. DIETZ JOSEPH M.中国专利:US1632390A,1927-06-14
[6]
The Cryospheric Information System and Its Applications .2 Li Xin. . 1998
[7]
Proceedingsof5 thInter nationalConferenceonPermafrost .2 LachenbruchAH,CladouhsTT,SaltusRW. TapirPublishers . 1988