Historia naturalis bulgarica, Volume 2 (1990)

Boev, Zlatozar — Parrots (Order Psittaciformes) in the collections of the National Natural History Museum — Sofia: 3—6 (in English, summary in Russian).

Nankinov, Dimitar; Ganev, Dobromir — A little known zoological collection of the naturalist Vladimir Vlaskov: 7—11 (in Bulgarian, summaries in Russian and English).

Atanasov, Neno; Vasileva, Emilya — New apian species (Hymenoptera, Apoidea) for the Bulgarian fauna: 12—18 (in Bulgarian, summaries in Russian and English).

Kolarov, Janko — New and rare Ichneumonidae (Hymenioptera) species for the Bulgarian fauna: 19—24 (in Bulgarian, summaries in Russian and English).

Boev, Zlatozar — One hundred years ornitological research in Bulgaria: 25—35 (in Bulgarian, summaries in Russian and English).

Kumanski, Krasimir — Studies on the fauna of Trichoptera (Insecta) of Korea. I. Superfamily Rhyacophiloidea: 36—60 (in English, summary in Russian).

Spassov, Nikolai — On the presence and specific position of Pangolins (Gen. Manis L.: Pholidota) in North Mozambique: 61—63 (in English, summary in Russian).

Spassov, Nikolai — Note on the coloration and taxonomical status of the bear (Ursus arctos L., 1758) in Bulgaria: 64—66 (in English, summary in Russian).

Grunchev, Raicho — Studies on the exterior and somatic features of the broun bearbear (Ursus arctos L., 1758) in Bulgaria: 67 (in Bulgarian, summaries in Russian and English).