Kujutav geomeetria. 1Humal, Arnold; Rünk, Ott; Garšnek, Aleksander1946 https://www.ester.ee/record=b1184124*est

Kujutav geomeetria. 1Humal, Arnold; Rünk, Ott; Garšnek, Aleksander1950 https://www.ester.ee/record=b1399264*est

Kujutav geomeetria. 3Humal, Arnold; Rünk, Ott; Garšnek, Aleksander1949 https://www.ester.ee/record=b1454283*est