THEORY ABOUT PABLO NERUDA (Overall information)
http://www.nobelprize.org/nobel_prizes/literature/laureates/1971/neruda-bio.html
THEORY ABOUT HIS WORK 20 love poems and a song of dispair. (Overall information)
http://es.wikipedia.org/wiki/Veinte_poemas_de_amor_y_una_canci%C3%B3n_desesperada (Spanish)
20 LOVE POEMS AND A SONG OF DISPAIR'S SUMMARIES AND ANALYSIS.
VIDEOS
http://www.poemhunter.com/poem/from-twenty-poems-of-love/
BOOKS
http://libguides.tts.edu.sg/content.php?pid=390440&sid=3227052
http://www.boppin.com/poets/neruda.html
http://www.ciudadseva.com/textos/poesia/20poemas.htm
http://www.poets.org/poetsorg/poem/song-despair