@misc{indiciaec056d832e1c2, title = {Extremely Luminous Far-infrared Sources (ELFS)}, author = {Harwit, Martin and Houck, James R. and Soifer, B. Thomas and Palumbo, Giorgio G. C.}, year = {1987}, url = {https://ntrs.nasa.gov/citations/19870014890}, note = {Source identifier: 19870014890} }