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Issue 93
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Front matter
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Table of Contents
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Miscellaneous
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Association News: Bericht über die Jahresversammlung 1971 in Fribourg
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1
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Article: Die schweizerische Erdölfrage im Jahre 1970
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7
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Article: Geothermal energy, a review
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17
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Article: Hydraulic conductivity tendencies in fractured and jointed rock
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41
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Obituary: Dr. Daniel Trümpy
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47
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Book review: Buchbesprechungen
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49
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Association News: Nachrichten
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52
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Miscellaneous
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Advertising
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