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%	Kimball52	Calculus of Variations - by Parallel Displacement
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@Book{Kimball52,
  author = 	 "William Scribner Kimball",
  title = 	 "Calculus of Variations - by Parallel Displacement",
  publisher = 	 "Butterworths Scientific Publications",
  year = 	 "1952",
  address =	 "London, England",
  note =	 "543 pages.",
}