| 1. | ![[036 WPA Pennsylvania Writers' Project] Oil and gas / Compiled by workers of the Writers Program of the [036 WPA Pennsylvania Writers' Project] Oil and gas / Compiled by workers of the Writers Program of the](/cgi-bin/thumbnail.exe?CISOROOT=/WPAChildren&CISOPTR=1838) | [036 WPA Pennsylvania Writers' Project] Oil and gas / Compiled by workers of the Writers Program of the Work Projects Administration in the Commonwealth of Pennsylvania. | Petroleum Juvenile -- literature. Natural gas -- Juvenile literature. | 48 p. illus. [2 col.] 19 cm. |