Riu subterrani (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Riu subterrani" in Catalan language version.

refsWebsite

Global rank Catalan rank

6^th place

29^th place

2,007^th place

1,676^th place

1web.archive.org

1^st place

1^st place

archive.org

William Herbert Hobbs, Earth Features and Their Meaning: An Introduction to Geology for the Student and the General Reader, Macmillan, 1912, pages 182 and 189.

unm.edu

Richard J. Heggen: Underground Rivers from the River Styx to the Rio San Buenaventura with Occasional Diversions Arxivat 2016-07-21 a Wayback Machine., University of New Mexico.

web.archive.org

Richard J. Heggen: Underground Rivers from the River Styx to the Rio San Buenaventura with Occasional Diversions Arxivat 2016-07-21 a Wayback Machine., University of New Mexico.