na INLIS000000000008785 20240930110114 0010-1118008785 240930 0 | Vlakke meetkunde / G. Krooshof; A. Pakken KROOSHOF, G. Batavia : J.B. Wolter, 1939 108 p. ; 22 cm. 511 KRO v Library has vol. I and III 511 MATHEMATICS 1173/73-mfn10564