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by Halff; Gregor
by Halff, Antoine; Sovacool, Benjamin K.; Rozhon, Jon
by Brieux, Alain; Halff, Bruno; Maddison, Francis
by Halff, Harry A.; Halff, Elizabeth; Neff, Emily Ballew (CON)
by Laskin, Alexander V.; Anthony, Kathryn E.; Cabezuelo-Lorenzo, Francisco; et al.
by Halff, Bro