Both A. van den Berg Pzn. (son) and Pl. van den Berg (father) have been contributors to the VAKBLAD. Because one time (page 642) the initials "A.v.d.B." are used. (logically for A. van den Berg Pzn.), in this volume the initials "v.d.B." -without A. -interpreted as Pl. van den Berg; the architectural drawings accompanying this article bear the monogram A.v.d.B. Hoogendijk listed as C. Hoogendijk. Design years: 1929 Illustrations: architectural drawings/bridge of reinforced beon, arc. A.v.d.B.