McKenna-Lawlor, S. M. P. (1981). Chromospheric and photospheric evolution of an extremely active solar region in solar cycle 19. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch.
Chicago Style CitationMcKenna-Lawlor, Susan M. P. Chromospheric and Photospheric Evolution of an Extremely Active Solar Region in Solar Cycle 19. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981.
MLA CitationMcKenna-Lawlor, Susan M. P. Chromospheric and Photospheric Evolution of an Extremely Active Solar Region in Solar Cycle 19. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981.