FLARE STARS IN THE PLEIADES REGION. II. Guillermo Haro and Enrique Chavira PDF (8 Mb)	181
NEW FLARE STARS IN THE PLEIADES Guillermo Haro and Graciela González PDF (2.9 Mb)	191
MULTICOLOR PHOTOGRAPHIC PHOTOMETRY OF ORION FLARE STARS A. D. Andrews PDF (6.2 Mb)	195
SOME REMARKS REGARDING PHOTOELECTRIC PHOTOMETRY Eugenio E. Mendoza V. PDF (2.5 Mb)	209
PHOTOELECTRIC PHOTOMETRY OF FAINT BLUE STARS AT HIGH GALACTIC LATITUDES Braulio Iriarte Erro PDF (2.2 Mb)	213
STUDIES ON STAR CLUSTERS (A NEW SMALL CLUSTER NEAR NGC 2175 AND SOME REMARKS ON THE LATTER) Paris Pishmish PDF (5.5 Mb)	219
THE EXTINCTION LAW IN THE ORION NEBULA Rafael Costero and Manuel Peimbert PDF (4.3 Mb)	229
RÁFAGA SOLAR DURANTE EL ECLIPSE DEL 7 DE MARZO DE 1970 Luis Rivera Terrazas y Graciela González PDF (1.3 Mb)	237
SPECTROSCOPIC OBSERVATIONS OF COMET BENETT NEAR PERIHELION Manuel E. Méndez PDF (1.3 Mb)	239
NOTE ON THE DESIGN OF TWO ROSS TYPE PHOTOGRAPHIC OBJETIVES A. Cornejo, J. Castro and D. Malacara PDF (2.0 Mb)	241