Logo of KPPC-FM, Pasadena, California freeform radio station from 1967–71

Scanned from the cover of the following cited book: Pierce, Dave (2008). Riding on the Ether Express: a memoir of 1960s Los Angeles, the rise of Freeform Underground Radio, and the legendary KPPC-FM. Lafayette, Louisiana: Center for Louisiana Studies, University of Louisiana at Lafayette. ISBN 978-1887366779. OCLC 144548083.

KROQ-FM

The entire logo is used to convey the meaning intended and avoid tarnishing or misrepresenting the intended image

The logo is of a size and resolution sufficient to maintain the quality intended by the company or organization, without being unnecessarily high resolution

The image is placed in the history of the article discussing KPPC-FM, a subject of public interest. The significance of the logo is to help the reader identify the organization, assure the readers that they have reached the right article containing critical commentary about the organization, and illustrate the organization's intended branding message in a way that words alone could not convey.

Because it is a logo there is almost certainly no free equivalent. Any substitute that is not a derivative work would fail to convey the meaning intended, would tarnish or misrepresent its image, or would fail its purpose of identification or commentary.