000
00258nam a2200097Ia 4500
008
190428s9999||||xx |||||||||||||| ||und||
100
_a
Anon
_9
15244
245
_a
Geophysics: geophysical studies
250
_b
1973. 160
260
_b
Open university. Keynes, U.S.A.
999
_c
15115
_d
15115