TY  - BOOK
AU  - Gray, Dwight E.,
AU  - Coutts, John Wallace,
TI  - Man and his physical world
U1  - 500 GRA 
PY  - 1966/// , repr. 1967
CY  - Princeton
PB  - Van Nostrand
KW  - Science
N1  - Includes refrences
ER  -