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1.
Contributions to group theory

by Appel Kenneth I | Lyndon Roger C | Ratcliffe John G | Schupp Paul E.

Series: Contemporary mathematics ; v. 33Material type: Computer file Computer file; Format: electronic Publication details: Providence, R.I. : American Mathematical Society, c1984Online access: Click here to access online Availability: Items available for reference: Accessible Online (1). : Location(s): .

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2.
Every planar map is four colorable

by Appel, Kenneth I | Haken Wolfgang.

Series: Contemporary mathematics ; v. 98Material type: Computer file Computer file; Format: electronic Publication details: Providence, R.I. : American Mathematical Society, c1989Online access: Click here to access online Availability: Items available for reference: Accessible Online (1). : Location(s): .

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