boletÍn de los observatorios de tonantzintla y …€¦ · it will be shown presently that this...
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© C
opyr
ight
196
3: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
BOLETÍN DE LOS OBSERVATORIOS DE TONANTZINTLA Y TACUBAYA, VOL. 3, N°23, 1963.
© C
opyr
ight
196
3: 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
196
3: In
stitu
to d
e A
stro
nom
ía, U
nive
rsid
ad N
acio
nal A
utón
oma
de M
éxic
o
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