A large number of paper projects also exist.

It was certainly more that a paper project.

But whether this actually set out or just remained a paper project is also uncertain.

At the Wexner, prison images haunt the paper projects.

His pieces provide the link between Conceptualism and the paper projects on view.

Neither of these "paper" projects received much interest from civil operators.

Remained a paper project only, before re-designation as the "He 177B-5" by August 1943.

As such it remained a paper project.

At this point the N-series was strictly a "paper project".

This type remained a paper project only.