Columbia subject headings:
Exports--Statistics--Periodicals.
International trade--Statistics--Periodicals.
Manufactures--Statistics--Periodicals.
Harvard subject headings:
Exports--Statistics--Periodicals.
International trade--Statistics--Periodicals
Manufactures--Statistics--Periodicals.
Princeton subject headings:
Exports--Statistics--Periodicals.
Industrial productivity--Statistics.
Machinery industry--Statistics.
Periodicals.
Statistics.