It says first that with the colonization after the first world war, there was a great influx of Italian migrants to Libya and that by 1939, they constituted 13% of the population (37% and 31% in Tripoli and Bengazi). There was thus a massive augmentation of the number of Catholics in Libya at the time.
It says then that the Italians restructured an old Roman theater. With the Italian colonization came also considerable construction programs which greatly ameliorated Libya's infrastructures, with new roads, bridges, railroads, docks, edifices, etc. The Libyan economy also boomed during that time. However, Italian activities made arable lands around Cyrene semi-desertic.
The Italians also did considerable archaeological projects in old Roman cities such as Leptis Magma and Cyrene. By the 1930s, Libya was considered as the new America for Italian immigrants.
They tried to mildly assimilate the Muslim Libyans by creating 10 villages for Arabs and Berbers that had their own mosques, schools, social centers (cinemas and gymnasiums), hospital. This kind of westernized and advanced settlements for local populations were unseen in North Africa at the time.
They would however have to be part of the Italian Empire in case of a victory over the Allies in the Second World War.
The tourist business was also developed and maintained by the Italians, which generated a lot of revenues.
In 1937, the Italian governor had a project of integration to integrate completely Libya into the Kingdom of Italy, which was done by 1939.
That's pretty much what it says. I don't know how much of it is true, though.