Google is expanding its lucrative Internet advertising network into the print world in a bold attempt to capture traditional ad dollars.

The search king, which makes 99 percent of its revenue from Internet ads, is quietly testing the waters of print advertising sales, according to executives at several companies that have bought the ads. Google recently began buying ad pages in technology magazines, including PC Magazine and Maximum PC, and reselling those pages--cut into quarters or fifths--to small advertisers that already belong to its online ad network, dubbed AdWords.

"We were approached by Google two and a half months ago, telling us that they were starting this print advertising campaign," Michael Keen, president of Inksite, one of the five advertisers in PC Magazine, said Monday. "Because we had been one of their AdWords advertisers, they thought we would be a good candidate to try their new advertising" effort.

The experiment, as it is described by the companies buying the ads, is Google's latest foray into display advertising and another big step toward becoming a one-stop shop for ad sales, whether online or offline. The trial also marks the first time the company has ventured offline with any of its products, according to industry watchers.

Read more: ZDNet News