National Electric Service Co. (Boston, M. (1887). The Johnson heat regulating apparatus in schools: For sale by National Electric Service Co., 120 Broadway, New York. [New York?: The Co..
Chicago Style CitationNational Electric Service Co. (Boston, Mass.). The Johnson Heat Regulating Apparatus in Schools: For Sale By National Electric Service Co., 120 Broadway, New York. [New York?: The Co., 1887.
MLA CitationNational Electric Service Co. (Boston, Mass.). The Johnson Heat Regulating Apparatus in Schools: For Sale By National Electric Service Co., 120 Broadway, New York. [New York?: The Co., 1887.
Warning: These citations may not always be 100% accurate.