Mémoires - Institut royal des sciences naturelles de Belgique. Verhandelingen - Koninklijk Belgisch Instituut voor Natuurwetenschappen.

No. 1-31, 33-35, 1900-24 have title in French only. ; No. 1-31 called v. 1-8. ; Mode of access: Internet. ; Issued 1900-48 by the institute under its earlier name: Musée royal d'histoire naturelles de Belgique. ; No. 1-100, 1900-43. 1 v.; no. 101-110, 1943-48. 1 v. (includes index to its Mémoires, 2. sér., no. 1-29); no. 111-144, 1949-58. 1 v. (includes index to its Mémoires, 2. sér., no. 30-57, and to its Volume Jubilaire Victor von Straelen, 1954); no. 111-159, 1949-68. (includes index for ser. 2, no. 30-83, 1949-68). ; UPDATED