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Contributor
Gavin, Bert
Remove constraint Contributor: Gavin, Bert
Contributor
Lamb, A. Roger
Remove constraint Contributor: Lamb, A. Roger
Subject
Competency-Based Education
Remove constraint Subject: Competency-Based Education
Subject
Competency-based educational tests
Remove constraint Subject: Competency-based educational tests
Subject
Correspondence
Remove constraint Subject: Correspondence
Year
1800 to 1999
Remove constraint Year: <span class='from'>1800</span> to <span class='to'>1999</span>