Textbooks

Prescott.L.M, Microbiology, McGraw Hill Publication (2005)18-22

Pelczar.J.M, Microbiology, Tata McGraw Hill Publication (1993)50-53

Pommerville.J.C, Alcamo's Fundamentals of Microbiology, Jones and Bartlett Publication (2004)101-108

Tortora.G.J, Microbiology, Pearson Education Publication (2004)54-57

Webliography

http://microbiology.suite101.com/article.cfm/what_is_a_compound_light_microscope

http://biology.clc.uc.edu/fankhauser/Labs/Microscope/Oil_Immersion.htm

http://www.microscopyu.com/articles/formulas/index.html

http://inventors.about.com/od/mstartinventions/a/microscope.htm