You may also wish to search for items by Nielsen, R. and Nielsen.
Only one matching reference was found.
Nielsen, R.L.; Weber, J.H., Vapor-Liquid Equilibria at Subatmospheric Pressures. Binary and Ternary Systems Containing Ethyl Alcohol, Benzene, and n-Heptane, J. Chem. Eng. Data, 1959, 4, 145. [all data]