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Pasaribu, F. F.; Daulay, A. S.; Ridwanto , R.; Nasution , M. A. Determination of Protein Levels of Several Types of Beans (Fresh Red Beans, Green Beans, Soybeans) For Handling Stunting Using the Kjeldahl Method and Visible Spectrophotometry. JPS 2025, 8, 2976-2987.