A group of bicyclists stands on the side of the road wearing anti-pollution signs during an environmental bike-in, Washington, D.C., 19 April 1970

Select what you would like to download. If choosing to download a page, please select the file format you wish to download. Please note full item download may take several minutes (PDF only).

Certain download types may have been restricted by the site administrator.

Select the item elements you would like to include in the embed code.