National Book Store Editorial Board. (1980). Philippine engineering laws (1980 rev. ed. with 1984 supplement.). National Book Store.
Dyfyniad Arddull ChicagoNational Book Store Editorial Board. Philippine Engineering Laws. 1980 rev. ed. with 1984 supplement. Manila: National Book Store, 1980.
Dyfyniad MLANational Book Store Editorial Board. Philippine Engineering Laws. 1980 rev. ed. with 1984 supplement. National Book Store, 1980.
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