Sama HK, Charukula FA. Effects of negotiation practices on public procurement performance in Tanzania: a case of national health insurance fund (nhif)-head office, Dodoma region. JRBA [Internet]. 2024 Mar. 25 [cited 2024 Nov. 21];1(147):118-33. Available from: https://be.kaznu.kz/index.php/math/article/view/2789