From White et al., (1964) and available as scanned PDF from Penn State library (thanks PSU!) here: https://digital.libraries.psu.edu/digital/collection/honeyboard/id/74/
From White et al., (1964) and available as scanned PDF from Penn State library (thanks PSU!) here: https://digital.libraries.psu.edu/digital/collection/honeyboard/id/74/