Closing Date for Materials: Three weeks preceding date of issue. In most cases, the deadline to reserve ad space can be extended at least one (1) full week. The deadline to submit ad materials can also usually be extended a minimum of one (1) full week at the discretion of the ENR Production Manager.. ENR SourceBooks are annual reference guides to the largest design and construction firms. These separate, perfect-bound publications are delivered with a regular issue of ENR in a clear plastic polybag and receive distribution to our entire subscriber base. ENR’s exclusive "Top Lists" are signature issues recognized worldwide as the authoritative "Who's Who" in construction and engineering.
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