temperature zones north and south americatropical belts approximate limit of frozen ground in...

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Temperature Zones North and South America Isaiah Bowman, Ph. D., Forest Physiography (New York, NY: John Wiley and Sons, 1911) Downloaded from Maps ETC, on the web at http://etc.usf.edu/maps [map #00911]

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Page 1: Temperature Zones North and South AmericaTROPICAL BELTS Approximate limit of frozen ground in Northern Hemisphere Isotherm of 50 for the coldest month season 4 months SUB-TROPICAL

Temperature Zones North and South AmericaIsaiah Bowman, Ph. D., Forest Physiography (New York, NY: John Wiley and Sons, 1911)

Downloaded from Maps ETC, on the web at http://etc.usf.edu/maps [map #00911]