6. Missions and the Frontier Economy
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1974 ◽
Vol 34
(1)
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pp. 239-264
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Keyword(s):
1997 ◽
Vol 29
(2)
◽
pp. 329-354
◽
Keyword(s):
2016 ◽
Vol 60
◽
pp. 93-111
◽
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Keyword(s):
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