$Natural Resource Partners(NRP)$ 8-K - Current report Filed: 2017-03-06 AccNo: 0001171486-17-000009 Size: 8 MBItem 1.01: Entry into a Material Definitive AgreementItem 2.02: Results of Operations and Financial ConditionItem 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance 网页链接