This is an undated photograph of the All STAR booth at an Energy Conference. There are several unidentified people in this photograph.

This is a photograph of an unidentified Energy Conference, with several unidentified people.

This is a photograph of an undated Energy Conference. Pictured are 3 booths with unidentified people. The booths are, Bay State Gas, CETA (Energy Conservation Training Program), and Con-Serv (Cellulose Insulation).

This  photograph is from an (undated) Energy Conference, Jackson Lumber booth. There are 3 unidentified men in the picture.

This is a photograph of 3 unidentified men at a conference booth.

Undated Energy Conference. Unidentified men at the Bay State Gas Booth.

Energy Conference, undated. ALL STOR booth is seen along with unidentified booths.

Two unidentified people at an Energy Conference, undated.

Undated Energy Conference. Unidentified man looking a a Helfrich Multi-Fuel Boiler Display.

Undated Energy Conference. Unidentified man.