Free Field research Pictures 41-71
Resetting Weather Recording Equipment
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Snowmelt Runoff Filling a Reservoir
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Sampling Bottom Sediments
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Collecting Africanized Honey Bees
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Inspecting Sugar Beet Plants
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Collecting Larkspur Samples
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Collecting Water Samples in a Cave
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Surveillance of Migrating Moths
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Receiving Precipitation Data
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Chinese Chestnut Seedling
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Alfalfa Irrigated With Highnitrate Groundwater
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On Horseback at the Rio Grande
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