Columbia subject headings:
Language policy--Peru--Congresses.
Sierra (Peru)--Languages--Congresses.
Sociolinguistics--Peru--Sierra--Congresses.
Harvard subject headings:
Indians of South America--Peru--Languages--Congresses.
Language and culture--Peru--Congresses.
Language policy--Peru--Congresses.
Sierra (Peru)--Languages--Congresses.
Sociolinguistics--Peru--Sierra--Congresses.
Princeton subject headings:
Andes Region--Languages--Social aspects--Congresses.
Indians of South America--Peru--Languages--Social aspects--Congresses.
Peru--Languages--Social aspects--Congresses.