The voice for IWLA in Canada. Their website offers regulations and policy standards that directly impact the operations of 3PL and warehousing industry. The Find a warehouse page allows you to locate a warehouse in Canada or the U.S. by city, state or ZIP code.
Warehousing Education and Research Council (WERC)
A professional organization focused on warehouse management and its role in the supply chain. The Resource Center tab contains information on warehouse certification and case studies, links to government agencies, associations, trade press/media and much more.
International Warehousing Logistics Association (IWLA) 
"The Resource for Warehouse Logistics". It provides news, educational events, certification and government/regulatory policies. The Library tab includes documents covering cases, handbooks and proposals, etc. 3PL Americas – IWLA’s quarterly magazine is worth reading as well.