Signaling continued restraint in marketing spending, the revenue for three key B2B media platforms declined during the third quarter of 2009 at approximately the same rates as during the first half of the year, according to American Business Media's Business Information Network.

Spending among the three media platforms totaled $15.1 billion in the first three quarters, a decrease of 19.3% from the same period in 2008, it said.

Below, additional BIN data issued by ABM.

Tradeshow revenue fell 19.2% in the third quarter, compared with 18.6% in the first half of the year. The decline in print media (25.7%) was only slightly less than severe than the 26.5% reported in the first half of the year.

Print's share of revenue fell to 37.4% in the third quarter of 2009 from 40.7% reported in the same period last year. Tradeshow revenue stayed flat, while digital's share of revenue climbed to 20.95 from 17.7% in 2008.