Catalogo PPM (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Catalogo PPM" in Italian language version.

refsWebsite

Global rank Italian rank

75^th place

131^st place

1tdc-harvard.edu

low place

low place

nasa.gov

heasarc.gsfc.nasa.gov

(EN) PPM - Positions and Proper Motions Catalog, su heasarc.gsfc.nasa.gov. URL consultato il 29 agosto 2019.

tdc-harvard.edu

(EN) PPM Star Catalog, su tdc-www.harvard.edu. URL consultato il 29 agosto 2019.