(2000). Helicopter landing take-off area not covered by A.O. No. AGA 14.03, series of 1973. Philippine Star.
Chicago-viite (17. p.)"Helicopter Landing Take-off Area Not Covered by A.O. No. AGA 14.03, Series of 1973." Philippine Star 2000.
MLA-viite (9. p.)"Helicopter Landing Take-off Area Not Covered by A.O. No. AGA 14.03, Series of 1973." Philippine Star, 2000.
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