KELLY, J M The estimation of isonicotinic acid hydrazide (nydrazid) in biologic fluids. [electronic resource] - American review of tuberculosis Apr 1952 - 484-5 p. digital Publication Type: Journal Article ISSN: 0096-0381 Standard No.: 10.1164/art.1952.65.4.484 doi Subjects--Topical Terms: Biological ProductsBody FluidsFecesIsoniazidNiacin--analogs & derivativesNicotinic AcidsRegression Analysis