field numbers

A.V. Fric (08.09.1882 - 04.12.1944) one of the most important collectors of cacti Wolf-Rainer Abraham (WRA) Walter Albrecht (A) Alexander Arzberger (AA) Ludwig Bercht (LB) Norbert Gerloff (Gf) Andreas Hofacker (AH) Horst and Uebelmann (HU) Karel Knize (KK) Wilhelm Knoll (WO) Jacques Lambert (JL) Alfred B. Lau (LAU) Dorothea Muhr (B) Wolfgang Papsch (WP) Brigitte and Jörg Piltz (P) Karl-Heinz Prestle (PR) Ken Preston-Mafham (PM) Jaroslav Prochazka (JPR) Walter Rausch (WR) Friedrich Ritter (FR) Hugo Schlosser (SCHL) Kerstin and Bernhard Schweitzer (BKS) Vladimír Šorma (VS) Dirk van Vliet (DV)

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