Columbia subject headings:
Harvard subject headings:
Industrial statistics--Egypt--Periodicals.
Pipe industry--Egypt--Statistics--Periodicals.
Steel pipe industry--Egypt--Periodicals.
Princeton subject headings:
Industries--Egypt--Statistics--Periodicals.
Periodicals.
Pipe industry--Egypt--Periodicals.
Pipe industry--Egypt--Statistics--Periodicals.
Statistics.
Steel pipe industry--Egypt--Periodicals.