TY - BOOK AU - Krotulski,Alex J. ED - National Criminal Justice Reference Service (U.S.), TI - Monitoring changes in the novel psychoactive substance (NPS) market through enhanced identification of emerging drugs and their metabolites in biological samples PY - 2018///] CY - [Rockville, Md.] PB - National Criminal Justice Reference Service KW - Psychotropic drugs KW - United States KW - Drug abuse KW - Drug testing N1 - "Document number: 251787"--Grant transmittal document; "Date received: June 2018"--Grant transmittal document; CRDP Program record; Includes bibliographical references (page [12]) UR - https://purl.fdlp.gov/GPO/gpo106249 ER -