. . "Roger R. Easson"@en . "Easson"@en . "Roger"@en . "Roger Ralph Easson"@nl-NL . "Roger.R" . . "R."@en . . . "Roger.R Easson" . "1945" . . "Roger Easson" . . "Roger R Easson"@en-AU . . . . "Ralph" . . .