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Reticolo di diffrazione atto a generare un flusso di radiazione lumi- nosa con distribuzione di intensita' prefissata in un'area sottendenteil flusso stesso.
Case studies of the impact of federal aid on major cities, city of Boston. The impact of federal grants on Boston in 1978. Federal aid case studies series paper no. 7[Final Report]
ACCIDENTS AT NIGHT. PART 1-STATE OF KNOWLEDGE BASED ON SPECIAL STATISTICAL STUDIES. PART 2-ANALYSIS OF NIGHT ACCIDENTS ON THE BASIS OF OFFICIAL ROAD ACCIDENT DATA
Equipement de mobilier urbain mobile a l'usage du public, et, supports publicitaires decoratifs ou de proprete, tendant a empecher l'affichage sauvage libre ou politique, et la degradation du materiel public et de voirie. equipement a poser en general autour des piliers de ponts routiers