Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2011.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212
English, Estonian, German, and Russian.
Issued by: Societas Investigatorum Rerum Naturae Academiae Scientiarum R.P.S.S. Estoniae, 1972- ; Societas Investigatorum Rerum Naturae Academiae Scientiarum Estoniae, <1992->
Description based on: Fasc. 1, published in 1972; title from journal home page (publisher’s Web site, viewed Jan. 19, 2012).