• Book chapter
    Kowalski K, Ruprecht AL. 1981. Family: Voles - Microtidae. Kosmos A 15 : 183-206.
  • Book chapter
    Kowalski K, Ruprecht AL. 1981. Family: Mice - Muridae. Acta Theriologica 12 : 206-230.
  • Book chapter
    Kowalski K, Ruprecht AL. 1981. Order: Bats - Chiroptera. In: Keys to Vertebrates of Poland. Mammals. Eds. Pucek, Z.. Acta Theriologica 12 PWN, Warszawa : 101-154.
  • Article in journal
    Krasińska M, Sumiński E. 1981. Colour phenotypes in hybrids of European bison and domestic cattle. Acta Theriologica 26 : 3-22.
  • Article in journal
    Malzahn E. 1981. Trace elements and their significance in the postnatal development of seasonal generation of the bank vole. Acta Theriologica 26 : 231-256.
  • Article in journal
    Olszewski JL. 1981. Białowieża - promieniowanie całkowite - sumy pór roku i roczne /kcal.cm kwadrat./. Promieniowanie całkowite - sumy dzienne, miesięczne i roczne /cal.cm kradrat./. In: Venomous animals and their venoms. Eds. Bücherl W. Promieniowanie Słoneczne Acad. Press, London : 18+214.
  • Article in journal
    Pucek M. 1981. Polish Theriological Bibliography, 1980. Acta Theriologica 26 : 509-522.
  • Book
    Pucek Z. 1981. Keys to Vertebrates of Poland. Mammals. PWN, Warszawa
  • Book chapter
    Pucek Z. 1981. Preface to the English Edition. In: Keys to Vertebrates of Poland. Mammals. Eds. Pucek Z. PWN, Warszawa : VII-VIII.
  • Book chapter
    Pucek Z. 1981. General Outline Systematic survey. In: Keys to Vertebrates of Poland. Mammals. Eds. Pucek Z. PWN, Warszawa : 1-59.