000 00351 a2200133 4500
080 _a551.1
_bG 251 U
245 1 _aUnderstanding the earth
_bA reader in the earth sciences
_cedited by I.G. Gass, et. al.
260 _aSussex
_bArtemis Press
_c1971
650 _aEarth
700 _aGass, I.G., ed.
100 _a
_d
300 _a355 p.
901 _a109819
999 _c31138
_d31138