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accounting, placing and preparing advertisements for others, namely dissemination of advertising matter, outdoor advertising, preparation of publicity texts, publicity columns preparation, publicity leaflets issuing, radio advertising, television advertising, and the preparation of promotional films, videotapes and audiotapes; market analysis; business appraisals; account auditing; business auditing; bookkeeping; business management consulting; business planning consulting; business organization consulting; commercial and industrial management assistance; document reproduction; efficiency experts; advisory services for business management; marketing research; marketing studies; personnel management consulting; public relations; publicity services; message transcription; stenographic transcription; typing; bookkeeping services, namely airline documentation control and distribution; aircraft technical records keeping; aircraft inventory and warehouse control; and procurement services, namely technical purchasing of aircraft materials