Observations of the Crab Nebula at λ = 5800 Å 2.2 μ, and 3.5 μ with a 4-MINUTE Beam Ney, Edward P. ; Stein, Wayne A. Abstract Publication: The Astrophysical Journal Pub Date: April 1968 DOI: 10.1086/180170 Bibcode: 1968ApJ...152L..21N