TY - BOOK AU - Gray, Dwight E. TI - MAN AND HIS PHYSICAL WORLD U1 - 500 PY - 1958/// CY - N. Y. PB - D. Van Nostrand Company, Inc. KW - Science N1 - Reading List : P. 671-680; First Published September, 1942... Second Edition October, 1946; Charts On Lining-Papers ER -