It was also a fruitful period from an artistic point of view.

The 1960s and 1970s were for the composer the most fruitful period.

In the following five years the State Opera experienced a very fruitful period.

And it was there he embarked on the most fruitful period of his career.

A particularly fruitful period over France occurred from 14-17 May 1940.

He began one of the most fruitful periods of his life, turning out several books a year for the next decade.

From 1829 to 1832, he had a very fruitful and successful period in Graz.

On arrival in Madrid, starts the most fruitful period of his literary output.

This was his most fruitful period in furthering the development and the quality of Chilean medicine.

This period became the most fruitful period of his academic life.