@book{4680, author = {Denyer, Stephen P. and Hugo, W. B.}, title = {Hugo and Russell's pharmaceutical microbiology /}, publisher = {Blackwell Science,}, year = {2004.}, address = {Malden, Mass. :}, edition = {7th ed.}, url = {http://www.loc.gov/catdir/toc/ecip0411/2003024264.html} }