Extensive construction works at the collection site, November 1959 (Kocián, 1959a, b, c).

 
 
  Part of: Štefánik M, Fedor P (2020) Environmental stress in Parnassius apollo reflected through wing geometric morphometrics in a historical collection with a possible connection to habitat degradation. Nature Conservation 38: 79-99. https://doi.org/10.3897/natureconservation.38.48682