Plný text je přístupný pouze z počítačů Ostravské univerzity
In lists on covers the vols. are arranged in series: 1st ser. 1841/43-1856 (8 v.); 2d ser. 1857-70 (14 v.); 3d ser. 1871-<1922 (52 v.)>
Volumes for 1857-1900 are unnumbered.
"Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794..
Electronic reproduction. [Place of publication not identified] : HathiTrust Digital Library, 2010.
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
Description based on first issue; title from cover (JSTOR, viewed Oct. 31, 2007).