Bibliography on the topic "The external geological activity of the Earth" and the work of the students

Underground water. (2017, August 15). Wikipedia, The Free Encyclopedia. Consultation date: 19:45, August 22, 2017 from https://es.wikipedia.org/w/index.php?title=Agua_subterr%C3%A1nea&oldid=101162231.
Biology and Geology 3 ^or (s. F.). Retrieved April 22, 2013, from http://recursostic.educacion.es/secundaria/edad/3esobiologia/
Diagenesis. (2019, December 2). Wikipedia, The Free Encyclopedia. Consultation date: 20:33, February 13, 2020 from https://es.wikipedia.org/w/index.php?title=Diag%C3%A9nesis&oldid=121728923.
Erosion. (2020, January 16). Wikipedia, The Free Encyclopedia. Consultation date: 20:46, February 14, 2020 from https://es.wikipedia.org/w/index.php?title=Erosi%C3%B3n&oldid=122819945.
Glacier. (2017, July 28). Wikipedia, The Free Encyclopedia. Date of consultation: 08:20, August 24, 2017 from https://es.wikipedia.org/w/index.php?title=Glaciar&oldid=100780994.
Weathering. (2017, June 1). Wikipedia, The Free Encyclopedia . Consultation date: 07:19, August 22, 2017 from https://es.wikipedia.org/w/index.php?title=Meteorizaci%C3%B3n&oldid=99543230 .
Biosphere Project. (s. f.). Retrieved April 22, 2013, from http://recursostic.educacion.es/ciencias/biosfera/web/index.htm
(s. f.). Retrieved April 21, 2013, from http://educativa.catedu.es/44700165/aula/archivos/repositorio//500/528/html/Unidad_06/index.htm