by Diego Pareja
Reference:
Instrumentos prehispánicos de cálculo: el quipu (Diego Pareja), In , volume 4, 1986.
Bibtex Entry:
@Article{Pareja1986, Title = {{Instrumentos prehisp'{a}nicos de c'{a}lculo: el quipu}}, Author = {Pareja, Diego}, Year = {1986}, Number = {1}, Pages = {37--56}, Volume = {4}, File = {:D$backslash$:/Испанская литература на русском/Переводы Бондаренко А/vol4i86-art3.pdf:pdf} }
Instrumentos prehispánicos de cálculo: el quipu