Timed-entry ticket reservations continue to be required for Museum entry. Facial coverings are strongly recommended. See Health and Safety.
Popov 1971 Historical Development of Nepomorpha Russian original
Popov 1971 Historical Development of Nepomorpha English translation
Reuter 1910 Phylogeny of Heteroptera German original
Reuter 1910 Phylogeny of Heteroptera English translation