Densities and Isothermal Compressibilities at Pressures up to 20 MPa of the Systems N,N-Dimethylformamide or N,N-Dimethylacetamide + α,ω-Dichloroalkane García-Giménez, P.; Martínez-López, J.F.; Blanco, S.T.; Velasco, I.; Otín, S.; Journal of Chemical & Engineering Data 2007, 52, 2368-2374