2021. Comparison of the Two Methods of Cluster Analysis (Non-Hierarchical and Hierarchical) in the Classification of Laboratory Quality (GLP) at the University of Babylon. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences. 29, 3 (Dec. 2021), 34–43. DOI:https://doi.org/10.29196/jubpas.v29i3.3881.