Prof. Ignacy Mościcki (President of Poland) system for ionising and purifying air – interest shown by the Italian Societa Publici Esercizi, 1935

A. (Arabic numerals) - Documents of Polish ministries, diplomatic posts and official institutions, 1919 - 1991 A.60 Polish Embassy in Rome, Italy, 1921 – 1939

Prof. Ignacy Mościcki (President of Poland) system for ionising and purifying air – interest shown by the Italian Societa Publici Esercizi, 1935 A. (Arabic numerals) – Documents of Polish ministries, diplomatic posts and official institutions, 1919 – 1991 A.60 Polish Embassy in Rome, Italy, 1921 – 1939