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PDFPage 322
. 1962 Jul;5(3):322. doi: 10.1901/jeab.1962.5-322
A response key for use with projection-type display units1
C B Ferster
, E P Holtzman
, W R Leckrone
C B Ferster
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E P Holtzman
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W R Leckrone
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1
This work was supported by grant from the National Science Foundation.
PMCID: PMC1404099 PMID: 16811270