Luna 21 (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Luna 21" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

4,664^th place

2,162^nd place

75^th place

92^nd place

3,042^nd place

2,711^th place

low place

7^th place

14^th place

7,430^th place

low place

collectspace.com (Global: 7,430^th place; Portuguese: low place)

«Lord British, we hardly knew ye». demiurg.net. Consultado em 26 de janeiro de 2014

Chang, Kenneth (20 de março de 2010). «After 17 Years, a Glimpse of a Lunar Purchase». New York Times. Consultado em 26 de janeiro de 2014. Richard A. Garriott has finally seen the item he bought 17 years ago for $68,500.

Krebs, Gunter (27 de janeiro de 2013). «Luna Ye-8». Gunter's Space Page. Consultado em 21 de janeiro de 2014