@book{13169, author = {Johnsonbaugh, Richard,}, title = {Discrete mathematics /}, publisher = {Pearson Prentice Hall,}, year = {c2009.}, address = {Upper Saddle River, NJ :}, edition = {7th ed.}, note = {Includes bibliographical references and index.}, url = {https://uowd.box.com/s/mdfaoxuvahcxkcu9zee476uzmx9byxl2} }