http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
GIBSON,W.Herbert: -- Concrete Design and construction.2nd ed., -- illustr. - Chicago:American Technical Soc. -- 1947. 500 S.mit 251 Fig. 8° -- 1975:B 1056/gb. -- Ko.°