Historia naturalis bulgarica, Volume 3 (1991)

Kumanski, Krasimir; Popov, Alexi — One hundred years of the National Museum of Natural History: 3—14 (in Bulgarian, summary in English).

Stanev, Stefan — Botanical collections of the National Museum of Natural History at the Bulgarian Academy of Sciences: 15—22 (in Bulgarian, summary in English).

Popov, Alexi — Entomological collections of the National Museum of Natural History at the Bulgarian Academy of Sciences: 23—36 (in Bulgarian, summary in English).

Boev, Zlatozar — Ornithological collections of the National Museum of Natural History at the Bulgarian Academy of Sciences: 37—48 (In Bulgarian, summary in English).

Kumanski, Krasimir — Studies on the fauna of Trichoptera (Insecta) of Korea. II. Family Leptoceridae: 49—71 (in English, summary in Russian).

Kolarov, Janko — New and little known parasitic Hymenoptera for the Bulgarian fauna: 72—74 (in Bulgarian, summary in English).

Boev, Zlatozar — Distribution and status of the oystercatcher (Haematopus ostralegus L., 1758) (Haematopodidae — Aves) in Bulgaria: 75—91 (in Bulgarian, summary in English).

Boev, Zlatozar — The birds of the Roman town of Nicopolis ad Istrum (2nd — 6-th c.) at Nikjup, Lovech Region: 92—109 (in Bulgarian, summary in English).

Delpech, Francoise; Guadelli, Jean-Luc — Quelques aspects de 1’archeozoologie d’apres les faunes de la grotte Temnata dupka a Karloukovo (Bulgarie du Nord): 110 (in French, summary in Russian).

Boev, Zlatozar — The centenary of the birth of Pavel Patev — the founder of contemporary Bulgarian ornithology: 111—116 (in Bulgarian, summary in English).

Stanev, Stefan — Little known names in Bulgarian botany. Vassil Kovachev: 117 (in Bulgarian, summary in English)).