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APA Citation
Unknown (1998). Technical foundations for measuring ego development. Place of publication not identified : Psychology Press. http://access.bl.uk/ark:/81055/vdc_100076112569.0x000001
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Unknown (1998). Technical foundations for measuring ego development. Place of publication not identified : Psychology Press. http://access.bl.uk/ark:/81055/vdc_100076112569.0x000001