* Cross references--Buildings which have become dangerous due to fire, § 9-3; hygiene of housing, §§ 12-12--12-37; dangerous buildings, § 12-35; dwellings unfit for human habitation, § 12-36; plumbing, Ch. 16; sewers, Ch. 20; general policy for installation of utilities, §§ 22-32--22-40; trailer camps, Ch. 24; building and electric requirements for trailer camps, § 24-15; water, Ch. 25; control of air condition equipment, §§ 25-23--25-26; airport zoning ordinance, App. B; subdivision regulations, App. C.