Chinese Version(中文版)
|
EBooks(电子书)
Ance
[eins]
Examples
On
September
18 Leverrier
sent
a
letter
to
Dr.
Galle
, ofthe
Berlin
Observatory
,
which
was
provided
with
a
set
of
star
maps
,
prepared
at
the
inst
ance
of
Bessel
.
Walter Libby.
An Introduction to the History of Science
.
Inputed by Inez