| 1. | ![[016 WPA Pennsylvania Writers' Project] Romance of rubber / Compiled by workers of the Writers' Program [016 WPA Pennsylvania Writers' Project] Romance of rubber / Compiled by workers of the Writers' Program](/cgi-bin/thumbnail.exe?CISOROOT=/WPAChildren&CISOPTR=2117) | [016 WPA Pennsylvania Writers' Project] Romance of rubber / Compiled by workers of the Writers' Program of the Work Projects Administration in the Commonwealth of Pennsylvania | Rubber industry and trade -- Juvenile literature | 48 p. illus. (part col.) 19 cm. |