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Fig. 4. Pot Sampling Stations
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Honolulu, Hawaii
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5.
6.
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West Los Angeles, Cal.
Salt Lake City, Utah
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7. Durban, South Africa
13. Karachi, Pakistan
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Causway, Southern Rhodesia
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Coral Gables, Fla.
Vermillion, S. D.
Birmingham, Ala
Hiroshima, Japan
Nagasaki, Japan
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Bangkok, Thailand
Rio de Janeiro, Brazil
Bogota, Colombia
Lima, Peru
Chicago, Til.
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