Logo URL Property Sharepoint SubSite using API REST

I need to obtain several properties of all websites of a root site.

I am using:

http://xxxxxxx/_api/web/webinfos?$select=ServerRelativeUrl,Title,Description

With this url I get Description, Title and ServerRelativeUrl

...
    <content type="application/xml">
        <m:properties>
            <d:Description>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eg</d:Description>
            <d:ServerRelativeUrl>/test</d:ServerRelativeUrl>
            <d:Title>Site name</d:Title>
        </m:properties>
    </content>
    ...
    <content type="application/xml">
        <m:properties>
            <d:Description>Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequa</d:Description>
            <d:ServerRelativeUrl>/test2</d:ServerRelativeUrl>
            <d:Title>Second Site name</d:Title>
        </m:properties>
    </content>
    .....  

But I can't get the url logo property for every website.

How I could obtain the url logo for all the first level websites from client side? (see resalted yellow text below)

Thank you!