TY  - SER
AU  - Szpylka,John
AU  - DeVries,Jonathan W.
TI  - Determination of beta-carotene in supplements and raw materials by reversed-phase high pressure liquid chromatography: collaborative study 
N1  - YA2006 M03 D01
ISSN  - 1060-3271
Sources  - Journal of AOAC International
Sources  - 88 (5) 2005 : 1279-1291
ER  -