. . . . . . "Examinations"@en . . "Marine engine room blue book : [questions & answers for firement, watertenders, oilers, electricians, refrigerating engineers, deck engineers, deck engine mechanics]"@en . . "Marine engine room blue book : questions & answers for firemen, watertenders, oilers, electricans refrigerating engineers, deck engineers deck engine mechanics"@en . . . . . . . . "Marine engine room blue book"@en . . "Marine engine room blue book" . . "Examinations, questions, etc"@en . .