Chartrand

Graphs & Digraphs, Fourth Edition (Textbooks in Mathematics)

By Chartrand, Gary, Lesniak, Linda, Zhang, Ping

Exploring Space: A Guide to Exploration of the Universe (Golden Guide)

By Chartrand, Mark R., Miller, Ron

Mathematical Proofs: A Transition to Advanced Mathematics: United States Edition

By Chartrand, Gary, Polimeni, Albert D., Zhang, Ping