NÚMERO 30
VOLUMEN 4
OCTUBRE 1968

THE MAGNETIC FIELD REVERSAL AS A COROLLARY TO A
MECHANISM OF THE ORIGIN OF SPIRAL STRUCTURE
Paris Pishmish

PDF (2.2 Mb)
229


INTERSTELLARMOLECULAR LINES IN A STARS
Manuel Peimbert

PDF (3.6 Mb)
233


SPECTROPHOTOMETRY OF THE ORION NEBULA.
II. THE ABUNDANCE OF ELEMENTS
Manuel E. Méndez

PDF (3.0 Mb)
240


DIRECT DESIGN SOLUTION FOR CASSEGRAIN SHIELDS
Alejandro Cornejo and Daniel Malacara

PDF (2.3 Mb)
246


A FINDING LIST OF STARS OF SPECTRAL TYPE A7 AND
EARLIER IN REGIONS AT HIGH GALACTIC LATITUDES.
II. SOUTH GALACTIC POLE
A. G.Davis Philip and Nicholas Sanduleak

PDF (4.7 Mb)
253