Is there reference material for dictionary abbreviations used in the first half of the 20th century?

sq., sqq. sequentia f., ff. [und] folgende [Seite]; [und] folgende [Seiten] http://de.wikipedia.org/wiki/Liste_lateinischer_Abkurzungen

however noun f. is Feminine substansive (noun - in German capitalized)

ie following (page or ff pages) common in German and because of the word similarity , why explain!

s. singular - much more important to a German but he may also have used s. as neuter (sesslich in German). Sinhalese has apparently 3 gender cases

http://www.languagesgulper.com/eng/Sinhalese.html

in general, I suggest to look for Latin abbrev. based around English, and what is possible within Sinhala