OpenDirect 2.1 for the Programmatic Guaranteed Trading of Both Traditional and Digital Media
https://iabtechlab.com/opendirect-2-1-for-the-programmatic-guaranteed-trading-of-both-traditional-and-digital-media/
https://iabtechlab.com/opendirect-2-1-for-the-programmatic-guaranteed-trading-of-both-traditional-and-digital-media/