/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3AW.%20S.%20Ray%2C&sort_by=relevance&format=rss 3 0 50 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=25470 By Brown, Amos P..
Harrisburg, Pa., W. S. Ray, 1913 .
160 p. 24 cm..

]]> Place hold on Minerals of Pennsylvania,

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=25470 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=25525 By Pennsylvania..
Harrisburg, Pa., W. S. Ray, State Printer, 1914 .
30 p. , At head of title: Topographic and Geologic Survey of Pennsylvania. | Text and plates are in portfolio. 24 cm..

]]> Place hold on Geologic map of southwestern Pennsylvania.

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=25525 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=25660 By Pennsylvania..
Harrisburg, Pa., W. S. Ray, State Printer, 1916 .
22 p. , At head of title: Topographic and Geological Survey of Pennsylvania; Richard R. Hice, State Geologist. | Folded map laid in. 23 cm..

]]> Place hold on Oil and gas map of southwestern Pennsylvania, 1915.

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=25660