Does anyone have an index for the following 1:25,000 German geological series
Geologische Spezialkarte von Preussen und den Thüringischen Staaten / Hrsg. durch d. Kgl. Preuss. Min. f. Handel, Gewerbe u. öffentl. Arbeiten

We have 9 sheets, but they are named, not numbered 9i've just scanned our sheets which will be viewable tomorrow, Wed.)
https://catalogue.nla.gov.au/Record/6503629


Thanks!

Brendan Whyte
National Library of Australia