From 1930 to 1934 he went through many catalogs and store displays in an effort to increase his collection.

They put out a call for donations of materials and gradually increased their collection over the years.

The Wallace is the exception because it has not been asked to increase its collection.

Since completing its new building two years ago, the museum has made a big push to increase its permanent collection.

The Caproni Museum was once again open to the public and kept on increasing its collection.

His main interest was to provide increase the library's collection of recent scientific literature.

Friday is market day here, and I never miss going to see the fishes to increase my collection.

It's also a good chance to increase your collection of miniature national flags.

And at his smile she frowned, seeing that he thought she was only increasing her collection.

At about 50 cents per digital book acquired, it's a cheap way for a library to increase its collection.