On the Ionization of the Interarm Medium of M33
P. Benvenuti, S. D'Odorico, & M. Peimbert
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Spectral classification of early type stars. Calibration using a TV-vidicon multichannel system
G. F. Bisiacchi, C. Firmani, R. Ortega, & R. Peniche
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ON the UBV Photometry of Seyfert Galaxies i: NGC 1068
E. Daltabuit, J. Canto, & J. Quisbert
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Multicolor photometry of metallic-line stars. IV. Hα and OI observations
E. E. Mendoza V.
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A preliminary report on Hα, OI photometry of young objects
E. E. Mendoza V.
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Erratum
S. Hacyan, D. Dultzin-Hacyan, S. Torres-Peimbert, & M. Peimbert
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Climatological and Meteorological Characteristics of the Observatorio Astronomico Nacional at San Pedro Martir, B. C.
M. Alvarez & Y. Maisterrena
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On the Correlation Between Rotational Velocities of the Components of Visual Binaries
J. A. Fernandez
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On an H II condensation in NGC 2175
P. Pismis
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A Photometer Using Silicon Diodes as Light Detectors
E. de Lara, C. K. Chavarria, H. L. Johnson, & R. Moreno
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An atlas of stellar spectra. I.
H. L. Johnson
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Obituary Carlos Cruz-Gonzalez
P. Pismis
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The Law of Interstellar Extinction
H. L. Johnson
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Photoelectric photometry and physical conditions of planetary nebulae
S. Torres-Peimbert & M. Peimbert
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Internal motions in H II regions. IV. The ring nebula NGC 2359
P. Pisçmis&cccedil;, E. Recillas-Cruz, & I. Hasse
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A New Michelson Spectrophotometer System
Harold L. Johnson
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Note on the Am stars in the alpha , lambda photometry
B. Hauck
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Photoelectric UBV observations of RR Lyrae variable stars. Second list
B. B. Bookmeyer, W. S. Fitch, T. A. Lee, W. Z. Wisniewski, & H. L. Johnson.
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Halpha and O I photometry of Ap stars
E. E. Mendoza V.
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Comments on the Optical Appearance of White Holes
D. Dultzin-Hacyan & S. Hacyan
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Erratum
H. L. Johnson & R. I. Mitchell
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Erratum
P. Pismis
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Fourier transform spectroscopy of four OB stars from 4800 to 10200 Å
H. L. Johnson, W. Z. Wisniewski, & T. D. Faÿ
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Spectroscopic observations of HD 93521: an O-type star of population II
G. F. Bisiacchi, L. Carrasco, R. Costero, & C. Firmani
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Remarks on Our Present Knowledge of Masses of Galaxies
P. Pismis & L. Maupomi
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On Collisional Ionization Rate Coefficients
J. Franco & E. Daltabuit
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Photoelectric measures of hydrogen lines in helium-weak stars
C. Feinstein
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A Determination of Galactic Rotation Parameters from O-Type Stars
C. Cruz-Gonzilez & A. Arellano Ferro
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On the Reaction Rates and Chemical Kinetics of Molecular Hydrogen Formation
M. A. Herrera & E. Daltabuit
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