1946 Senate Bill 0470. Resolve Providing For An Investigation And Study By A Joint Board Consisting Of The Department Of Public Health And The State Reclamation Board Relative To The Protection Of The Public Health And The Relief From The Greenhead Fly Nuisance In The Tidal Areas In The Cities Of Newburyport And Gloucester And The Towns Of Salisbury, Newbury, Rowley, Ipswich And Essex In Northern Essex County.