000 00325nam a2200157Ia 4500
082 _a338.6
_bUt93.IC
100 _aUtton, M. A.
245 _aIndustrial concentration
_b
260 _aHarmondsworth
_bPenguin
_c1970
300 _a131p.
500 _a
690 _a
700 _a
964 _a
_b
_c
_d
_e
_f
_g
921 _a5496
999 _c5496
_d5496