Obla, K. H. (2015). Improving concrete quality. Taylor & Francis National Ready Mixed Concrete Association.
Chicago-viite (17. p.)Obla, Karthikeyan H. Improving Concrete Quality. Boca Raton: Taylor & Francis National Ready Mixed Concrete Association, 2015.
MLA-viite (9. p.)Obla, Karthikeyan H. Improving Concrete Quality. Taylor & Francis National Ready Mixed Concrete Association, 2015.
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