(1969). Recommendations for non-destructive methods of test for concrete. London: British Standards Institution.
Παραπομπή Chicago StyleRecommendations for Non-destructive Methods of Test for Concrete. London: British Standards Institution, 1969.
Παραπομπή MLARecommendations for Non-destructive Methods of Test for Concrete. London: British Standards Institution, 1969.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.