Author Mariano N. S.Si, Problems and solutions, indonesian language, astronomy olympiads.
Format pdf, size 1,12 MB, contents 10 pages, 41 problems, 41 solutions, downloadable.
Provided by
http://soal-olim-astro.blogspot.com
Download page link
http://soal-olim-astro.blogspot.com/2011/03/soal-astronomi-dan-pembahasannya.html