523-02323
Young man coughing  with graph paper background.
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523-02323
Young man coughing with graph paper background.
400-00762
test tubes and notes
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400-00762
test tubes and notes
400-00763
test tubes and notes
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400-00763
test tubes and notes
400-00764
copybook of laboratory
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400-00764
copybook of laboratory
328-00536
Practicing writing Chinese
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328-00536
Practicing writing Chinese
328-00538
Close-up of person using workbooks to study Chinese
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328-00538
Close-up of person using workbooks to study Chinese
328-00539
Close-up of person using workbooks to study Chinese
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328-00539
Close-up of person using workbooks to study Chinese
328-00541
Close-up of hand practicing writing chinese
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328-00541
Close-up of hand practicing writing chinese
103-00140
Examiner reads the graph from a POLYGRAPH TEST.
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103-00140
Examiner reads the graph from a POLYGRAPH TEST.