Preparation and certification of standard reference material 1507: 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid in freeze-dried urine. [electronic resource]
Producer: 19890703Description: 540-4 p. digitalISSN:- 0003-2700
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Publication Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
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