Période

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The Old Cedars In Lebanon
UMG22A64_136

The Old Cedars In Lebanon

Workers use a low temperature scanning electron microscope (LT-SEM) to view anatomical structures needed to identify nematodes like the Parasitorhabditis nematode associated with pine trees and bark b...
UMG22A13_413

Workers use a low temperature scanning electron mi...

At the close of the day. Waiting for the cage to go up. Pennsylvania Coal Co.,. 1908
UMG20A58_335

At the close of the day. Waiting for the cage to g...

At the close of the day. Waiting for the cage to go up. 1908
UMG20A58_334

At the close of the day. Waiting for the cage to g...