na 1972

1972. Higiene. 32pp.

@misc{129359,
  pages      = {32},
  title      = {Higiene},
  year       = {1972},
  country    = {Ecuador [EC]},
  lgcode     = {Spanish [spa]},
  macro_area = {Eurasia},
  sil_id     = {13275},
  src        = {sil16},
  subject    = {Health and hygiene [Zhhb]}
}