September 1954 (age 55)
Nothing to report.
September 1969 (age 70)
In an editorial for Living Wilderness magazine, Sigurd says that "wilderness problems cannot stand apart from the basic environmental and population issues of our time."
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September 1954 (age 55) Nothing to report.
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September 1969 (age 70) In an editorial for Living Wilderness magazine, Sigurd says that "wilderness problems cannot stand apart from the basic environmental and population issues of our time."
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