By G. B. Young
By George Goodall
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By Poysti, Lasse, Valta, Matti (Photos by)
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By reader's digestion association limited
By Barnes, Robert D., Ruppert, Edward E., Ruppert, Edward E.
By Manning, Aubrey, Dawkins, Marian Stamp
By Briggs, K.
By Redfern, David, Skinner, Malcolm, Farmer, Geoff
By Marsden, Walter, the editors of Time-Life Books, Time-Life Books, of
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By Reader's Digest Editors, Various.
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By George St. George
By Bradshaw, Michael
By Arthur Holmes D.Sc. F.R.S.