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Consortium of Swiss Academic Libraries

The International Community and the Environment

Strong, Maurice F.

In: Environmental Conservation, 1977, vol. 4, no. 3, p. 165-172

Consortium of Swiss Academic Libraries

Closure operators and projections on involution posets

Rüttimann, Gottfried T.

In: Journal of the Australian Mathematical Society, 1974, vol. 18, no. 4, p. 453-457

Consortium of Swiss Academic Libraries

Challenges in a Changing World

Mitchell, Harold P.

In: Environmental Conservation, 1978, vol. 5, no. 1, p. 3-10