Johnson collaborated with Clarence Stein, the planner of Radburn, New Jersey.

Clarence Stein, a main proponent of the movement, incorporated it in the Radburn, NJ subdivision, which was to become a model for subsequent neighbourhood developments.

With Clarence Stein he wrote "The architecture and the gardens of the San Diego Exposition".

Previous Executive Directors have included Roger Starr and Clarence Stein.

Another regular partner was Clarence Stein.

MacMahon was married to Clarence Stein, an architect and city planner, who founded the Regional Planning Association in 1928.

Clarence Stein's work expanded the idea of a Garden City.

The station was designed and built in 1930 by Clarence Stein as part of the Radburn development.

Clarence Stein attended the Ethical Culture Society's Workingman's School, which influenced his interest in the city life and social responsibility through its teaching.

His ideas were realized in neighborhoods like Radburn through the work of Clarence Stein.