Referances
R. Akins, November 19,
2010
J.
Smith, (March 22, 2010), The Many Uses of Pencils. Retrieved from: www.articlesonline.smith/pencils.html
A. Morrow, (2011), The
Beauty of Mechanical Pencils. Location: Westing Forge in Denver.
H. Goldman, E. Howard (1989).
Pens vs. Pencils. Location: Gold House in Philadelphia
Public Video, The Ink
of Mystery, B. Howard. November 2009.
J. Gruber, (2008), Writing
Utensils. Encyclopedia of Style. 5th
edition.
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