Columbia subject headings:
Agricultural laws and legislation--Peru.
Communication and traffic--Peru.
Industrial laws and legislation--Peru.
Mining law--Peru.
Peru--Public works.
Public welfare--Law and legislation--Peru.
Harvard subject headings:
Agricultural laws and legislation--Peru.
Communication and traffic--Peru.
Industrial laws and legislation--Peru.
Mining law--Peru.
Public welfare--Law and legislation--Peru.
Public works--Peru.
Princeton subject headings: