Mass thickness manual for walls, floors, and roofs.
Contributors: United States. Federal Emergency Management Agency.
Publisher: Federal Emergency Management Agency
Published: 1980
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 47
Subjects: Nuclear bomb shelters -- Design and construction.; Nuclear bomb shelters -- Standards.; Civil defense -- United States.
Notes: Cover title.

"Sept. 1980."

"Supersedes TR-68 dated May 1979, which may be used."