(en-US) Special to People’s World, « This week in history: Sesquicentennial of African-American explorer Matthew Henson », sur People's World, 8 août 2016
Developments Involving the Democratic People's Republic of Korea: A Report to Congress Pursuant to the National Defense Authorization Act for Fiscal Year
phenomenon of outbursts of coal and gas in some australian collieries ; 5th ISRM Congress, April 10 - 15 (Melbourne, Australie) ; Ed: Australian Geomechanical