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Improved Axles for Turning Narrow Curves - p57
doi:10.1038/scientificamerican11111848-57b
Low Fares Increase Travel and increase Profits - p57
doi:10.1038/scientificamerican11111848-57h
Oxidation of the Diamond the Liquid in Way - p59
doi:10.1038/scientificamerican11111848-59c