While there is no "Volume 13" in the original set, the "13" in your query most likely relates to one of the following:
Details flat horizontal closures, "lifting" procedures, mobile closures, and skylights. enrico mandolesi edilizia pdf 13
Explores horizontal closures, including flat surfaces, lifting procedures, and skylights. Volume 4: Covers inclined and curved horizontal closures. Decoding "PDF 13" While there is no "Volume 13" in the
: The series has seen numerous reprints; "13" may refer to the thirteenth printing of a specific volume used in university curricula. and skylights. Explores horizontal closures