000
00260nam a2200097Ia 4500
008
190428s9999||||xx |||||||||||||| ||und||
100
_a
Anon
_9
29105
245
4
_a
The nature of physical knowledge
250
_b
1961. 156
260
_b
Oliver and Boyd. Edinburgh, U.K.
999
_c
28564
_d
28564