000 00287 a2200121 4500
082 _a547.74
_bIn8v
245 1 _aVITAMIN A POTENCY OF BETA-CAROTENE
260 _aLondon
_bButterworths Scientific Pub.
_c1959
300 _a11
650 _aVitamins
964 _gCIRC
997 _a58718 C
999 _c455184
_d455184