Riddle, W. Lead Pencils // The Builder. Aug. 3, 1861. P. 537–538. [См. также: The Builder, July 27, 1861: 517.]
Rix, Bill. Pencil Technology // A paper prepared for a course taught by Professor Walter G. Vincenti, Stanford University, ca. 1978.
Robinson, Tho. An Essay Towards a Natural History of Westmorland and Cumberland, [etc.]. London, 1709.
Rocheleau, W. F. Great American Industries. Third Book: Manufactures. Chicago, 1908.
Roe, G. E. The Pencil // Journal of the Writing Equipment Society. № 5. 1982. P. 12.
Rolt, L. T. C. The History of the History of Engineering // Transactions of the Newcomen Society, 42. 1969–70. P. 149–158.
Root, Marcus Aurelius. The Camera and the Pencil; or the Heliographic Art. [1864 ed.] Pawlet, Vt., 1971.
Rosenberg, Harold. Saul Steinberg. NY, 1978.
Rosenberg, N., and W. G. Vincenti. The Britannia Bridge: The Generation and Diffusion of Knowledge. Cambridge, Mass., 1978.
Ross, Stanley. Drafting Pencil — A Teaching Aid // Industrial Arts and Vocational Education. Feb. 1957. P. 52–53.
Russell and Erwin Manufacturing Company. Illustrated Catalogue of American Hardware. 1865 ed. [Washington, D.C., 1980.]
Russo, Edward, and Seymour Dobuler. The Manufacture of Pencils // NY University Quadrangle. № 13. May 1943. P. 14–15.
Sackett, H. S. Substitute Woods for Pencil Manufacture // American Lumberman. Jan. 27. 1912. P. 46.
Sandburg, Carl. The Complete Poems. Revised and expanded ed. NY, 1970.
Scherer, J. S. More than 55 % Replies // Printers’ Ink. № 188. Aug. 11, 1939. P. 15–16.
Schodek, Daniel L. Landmarks in American Civil Engineering. Cambridge, Mass., 1987.
Schrodt, Philip. The Generic Word Processor // Byte. Apr. 1982. P. 32, 34, 36.
Schwanhausser, Eduard. Die Nürnberger Bleistiftindustrie von Ihren Ersten Anfängen bis zur Gegenwart. Greifswald, 1893.
Scribner’s Monthly. How Lead Pencils Are Made. April 1878. P. 801–10.
Sears, Roebuck and Company. Catalogue. Various original and reprinted ed.s.
Seeley, Sherwood B. Carbon (Natural Graphite) // In Encyclopedia of Chemical Technology, 4. 2nd ed. 1964. P. 304–55.
Seeley, Sherwood B. Manufacturing pencils // Mechanical Engineering. Nov. 1947. P. 686.
Silliman, Professor. Abstract of Experiments on the Fusion of Plumbago, Anthracite, and the Diamond // Edinburgh Philosophical Journal. № 9. 1823. P. 179–83.
Singer, Charles, et al., editors. A History of Technology. Oxford, 1954–78.
Slocum, Jerry, and Jack Botermans. Puzzles Old and New: How to Make and Solve Them. Seattle, 1986.
Smiles, Samuel. Lives of the Engineers. Popular ed. London, 1904.