W. Wechler (Wechler, W.)
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Algebraic and Logic Programming: Second International Conference, Nancy, France, October 1-3, 1990, Proceedings
by H. Kirchner, W. Wechler
Softcover, Springer Verlag, ISBN 0387531629 (0-387-53162-9)
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Algebraic and Logic Programming: International Workshop
by P. Lescanne, J. Grabowski, W. Wechler
Softcover, Springer Verlag, ISBN 0387506675 (0-387-50667-5)