Islam, R. L. Mallett, P. D. Mannheim, and M. S. Swanson, p. 139. Singapore: 

 World Scientific Publishing, 1989. 



Habbal, S. R.; Dowdy, J. F.; and Withbroe, G. L. "A Comparison between Bright 

 Points in a Coronal Hole and a Quiet Sun Region." Astrophysical Journal 352 

 (1990): 333. 



Hahn, Y., and Dalgarno, A. "Production of Negative Hydrogen Ions in Neutral H+H 

 Collisions." Physical Review A 41 (1990): 4783. 



Hales, S. E. G.; Masson, C. R.; Warner, P. J.; and Baldwin, J. E. "The 6C Survey 

 of Radio Sources. EI: The Zone 48° < 6 < 68°, 05 h 25 m < a < 18 h 17 m ." Monthly 

 Notices of the Royal Astronomical Society 246 (1990): 256. 



Harris, D. E. "Extrapolating Electron Spectra to Low Energies." In Low Frequency 

 Astrophysics from Space, Lecture Notes in Physics , vol. 362, eds. N. E. Kassim 

 and K. Wyler, p. 252. Berlin: Springer- Verlag Publishing Company, 1990. 



Harris, D. E.; Forman, W.; Gioia, I. M.; Hale, J. A.; Harnden, F. R.; Jones, C; 

 Karakashian, T.; Maccacaro, T.; McSweeney, J. D.; Primini, F. A.; Schwartz, 

 J.; Tananbaum, H. D.; and Thurman, J. "The Einstein Observatory Catalog of 

 IPC X-Ray Sources." FITS version issued on CD-ROM, January 1. Cambridge, 

 Massachusetts: Smithsonian Institution Astrophysical Observatory, 1990. 



Harris, D. E.; Forman, W.; Gioia, I. M.; Hale, J. A.; Harnden, F. R.; Jones, C; Mac- 

 cacaro, T.; McSweeney, J. D.; Primini, F. A.; Schwarz, J.; and Tananbaum, H. D. 

 "The Einstein Observatory Source Catalog." In Imaging X-Rav Astronomy: A 

 Decade of Einstein Observatory Achievements , ed. M. Elvis, p. 309. Cambridge: 

 Cambridge University Press, 1990. 



Harris, D. E.; Stern, C. P.; and Biretta, J. A. "Integrity of HRl Images." In 

 Imaging X-Rav Astronomy: A Decade of Einstein Observatory Achievements , 

 ed. M. Elvis, p. 299. Cambridge: Cambridge University Press, 1990. 



Harris, K.; Pomerantz, M. A.; Reynolds, P. T.; Vacanti, G.; Walker, A.; and Weekes, 

 T. C. "Design Considerations for a TeV Telescope at the South Pole." In 

 Astrophysics in Antarctica, American Institute of Physics Conference Proceed- 

 ings , vol. 198, eds. D. J. Mullan, M. A. Pomerantz, and T. Stanev, p. 20. 

 New York: American Institute of Physics, 1989. 



Hartigan, P.; Curiel, S.; and Raymond, J. C. "Molecular Hydrogen and Optical Images 

 of HH 7-11." Astrophysical Journal (Letters) 347 (1989): L31. 



Hartigan, P.; Hartmann, L.; Kenyon, S. J.; Strom, S. E.; and Skrutskie, 

 M. F. "Correlations of Optical and Infrared Excesses in T Tauri Stars." 

 Astrophysical Journal (Letters) 354 (1990): L25. 



Hartmann, L. "Emission Lines in T Tauri Stars." In Proceedings of the Sixth 

 Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun. Astronom- 

 ical Society of the Pacific Conference Series , vol. 9, ed. G. Wallerstein, p. 289. 

 San Francisco: Astronomical Society of the Pacific, 1990. 



Hartmann, L.; Calvet, N.; Avrett, E. H.; and Loeser, R. K. "Winds from T Tauri Stars. 

 I. Spherically-Symmetric Models." Astrophysical Journal 349 (1990): 168. 



Hartmann, L., and Kenyon, S. J. "Optical Veiling, Disk Accretion, and the Evolution 

 of T Tauri Stars." Astrophysical Journal 349 (1990): 190. 



Haschick, A. D.; Baan, W. A.; and Menten, K. M. "Detection of Three New Methanol 

 Maser Transitions toward Star Forming Regions." Astrophysical Journal 346 



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