... Department of Science Education, Jeonju National University of Education, Jeonju 560-757, Korea * E-mail: hankoh@jnue.kr Received September 2, 2012, Accepted ... Korean Chem. ... 14. Crumpler, TB; Yoh, JH Chemical Computations and Error; Wiley: New York, 1940; p 178. 15. ...