©2013 National Research Council of Thailand
Navapol Krishnamra. 2008. Behavior of spirally prestressed concrete columns. Faculty of Engineering, Chulalongkorn University;
Navapol Krishnamra. (2008) Behavior of spirally prestressed concrete columns . Chulalongkorn University/Bangkok.
Navapol Krishnamra. Behavior of spirally prestressed concrete columns. . Bangkok:Chulalongkorn University, 2008.
Navapol Krishnamra. (2008) Behavior of spirally prestressed concrete columns . Chulalongkorn University/Bangkok.