He helped to found the art magazine Apollo in 1925, and became one of its most active contributors.

Sacred Heart has always been an active contributor to the local community.

He formally retired in 1999, but remains an active contributor to the field.

In addition to his business interests, he was a very active political contributor.

It was a course on American political economy, and George had been an active contributor.

He left the newspaper in 1997 but remains an active contributor to various publications.

He was also an active technical contributor to the standard.

He was also an active contributor to astronomy and meteorology.

There are more than 75,000 "active contributors," many of whom remain anonymous.

He is still an active contributor to the field of seismic exploration.