av Johnson, Stephen, Science Teacher, Sterling High School, Sterling, IL, 2005 & 2011 Dr. James
BOK (Häftad). Centre for Strategic & International Studies,U.S., 2013-06-07 Engelska.
BOK (Häftad). Centre for Strategic & International Studies,U.S., 2012-03-15 Engelska.
BOK (Häftad). Centre for Strategic & International Studies,U.S., 2012-03-01 Engelska.