The face in the mirrorJulian Keenan, Gordon G. Gallup, Dean Falk · First published 2003 · Latest edition 2004Open the Tome
Mirror-image stimulation and psychological researchGordon G. Gallup · First published 1968Open the Tome
A technique for assessing the motivational properties of self-image reinforcement in monkeysGordon G. Gallup · First published 1966Open the Tome
