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BOLETÍN DE LOS OBSERVATORIOS DE TONANTZINTLA Y TACUBAYA, VOL. 2, N°13, 1955.
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
© C
opyr
ight
195
5: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
