Authors: LANGFITT TW

Citation: Tw. Langfitt, DUNLOP,ROBERT,G., IN-MEMORIAM (VOL 142, JUNE 1998), Proceedings of the American Philosophical Society, 142(3), 1998, pp. 323-323

Authors: LANGFITT TW

Citation: Tw. Langfitt, DUNLOP,ROBERT,G., 2 JULY 1909 20 SEPTEMBER 1995 - IN-MEMORIAM, Proceedings of the American Philosophical Society, 142(3), 1998, pp. 513-514

Authors: LANGFITT TW

Citation: Tw. Langfitt, DUNLOP,ROBERT,G., JULY 2, 1909 SEPTEMBER 20, 1995 - IN-MEMORIAM, Proceedings of the American Philosophical Society, 142(2), 1998, pp. 284-286

Authors: LANGFITT TW ASBURY CH

Citation: Tw. Langfitt et Ch. Asbury, THE SCIENCE OF CHILDHOOD POTENTIAL, Issues in science and technology, 12(2), 1996, pp. 43-48