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Ritchie Steve 1953 : Metaphor and analogy in science education / edited by Peter J. Aubusson, Allan G. Harrison and Stephen M. Ritchie.
Ritchie Ward 1905 1996 : Influences on California printing; papers read at a Clark Library seminar April 11, 1970 / by James D. Hart and Ward Ritchie. With an introd. by Andrew H. Horn and a bibliography of the Primavera Press by J. M. Edelstein.
Ritchie William C : The handbook of bilingualism and multilingualism / edited by Tej K. Bhatia and William C. Ritchie.
Ritenour John S John Sturgis 1851 : Notes on the settlement and Indian wars of the western parts of Virginia and Pennsylvania from 1763 to 1783 inclusive : together with a review, of the state of society and manners of the first settlers of the western country / by Joseph Doddridge ; with a memoir of the author by his daughter, Narcissa Doddridge ; republished with the addition of new and valuable material, by J. S. Ritenour and W. T. Lindsey ; Pittsburgh, Pa., 1912.
Ritland M A : Sintering technology / edited by Randall M. German, Gary L. Messing, Robert G. Cornwall.
Ritland Marcus : 3D printing with SketchUp : real-world case studies to help you design models in SketchUp for 3D printing on anything ranging from the smallest desktop machines to the largest industrial 3D printers / Marcus Ritland.