$Natural Resource Partners(NRP)$ 8-K - Current report Filed: 2016-03-22 AccNo: 0001171486-16-000033 Size: 390 KBItem 1.01: Entry into a Material Definitive AgreementItem 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a RegistrantItem 9.01: Financial 网页链接