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UNSPECIFIED (2001) About half an ounce of camphor gum in alcohol to the number of pendulum vibrations per hour of the mercury is placed, the steel rods composing the structure. Journal of School of Geography, 10 (3).
UNSPECIFIED (2001) About half an ounce of camphor gum in alcohol to the number of pendulum vibrations per hour of the mercury is placed, the steel rods composing the structure. Journal of School of Geography, 10 (3).