. Rickett, W. Allyn (1998). Guanzi. Princeton: Princeton University Press. . Ronan, Colin A. (1994). The Shorter Science and Civilisation in China: Volume 4. Cambridge : Cambridge University Press. . Rudolph, R.C. "Preliminary Notes on Sung Archaeology," The Journal of Asian Studies (Volume 22, Number 2, 1963): 169–177. . . Sarton, George. (1959). A History of Science: Hellenistic Science and Culture in the Last Three Centuries B.C. New York: The Norton Library, Norton & Company Inc. . Schur, Nathan. (1998). The Relevant History of Mankind. Brighton: The Alpha Press. . Shi, Rongzhuan. "The Unearthed Burial Jade in the Tombs of Han Dynasty's King and Marquis and the Study of Jade Burial System", in Cultural Relics of Central China, 2003, No. 5: 62–72. . Shinoda, Osamu 篠田統. "O-tōfu no hanashi" お豆腐の話し [On tofu]. Gakuaji 樂味, June 1963: 4–8. Shotwell, Peter, Huiren Yang, and Sangit Chatterjee. (2003). Go! More Than a Game. North Clarendon: Tuttle Publishing. . Shurtleff, William and Akiko Aoyagi. (2001). The Book of Tofu: Protein Source of the Future...Now! Berkeley: Ten Speed Press. . Sivin, Nathan (1995). Science in Ancient China: Researches and Reflections. Brookfield, Vermont: VARIORUM, Ashgate Publishing. Smith, Joseph A. (1992). The Pen and Ink Book: Materials and Techniques for Today's Artist. New York: Watson-Guptill Publications. . Soedel, Werner and Vernard Foley. "Ancient Catapults," Scientific American, Vol. 240, No. 3 (March 1979): 120–128. . . Speak, Mike. (1999). "Recreation and Sport in Ancient China: Primitive Society to AD 960," in Sport and Physical Education in China, 20–44. Edited by James Riordan and Robin E. Jones. London: E & FN Spon, an imprint of the Taylor and Francis Group. Simultaneously published in the US and Canada under New York: Routledge. . Sterckx, Roel (2002). The Animal and the Daemon in Early China. New York: State University of New York Press. . Sun, E-tu Zen and Shiou-chuan Sun. (1997). Chinese Technology in the Seventeenth Century: T'ien-kung K'ai-wu. Mineola: Dover Publications. . Sun, Ji 孙机. "Doufu wenti" 豆腐问题 [The tofu issue]. Nongye kaogu 农业考古 [Agricultural archeology], 1998, vol. 3: 292–96. . Tan, Han H. (2002). "Who Was Sun Zi?" in Sun Zi's The Art of War, 16–18. Aspley: H.H. Tan Medical P/L Ltd. . Teresi, Dick. (2002). Lost Discoveries: The Ancient Roots of Modern Science–from the Babylonians to the Mayas. New York: Simon and Schuster. . Tom, K.S. (1989). Echoes from Old China: Life, Legends, and Lore of the Middle