00399nam a22001457a 450000500170000000800410001702000080005804100080006608200170007410000190009124500640011026000480017430000120022270000190023420260618114700.0260618b        |||||||| |||| 00| 0 eng d  a000  aeng  a334.6bHEL/T  aHelm, Franz C.  aThe Economics of Co-operative Enterprisec/by Franz C. Helm  aLondon:bThe Co-Operative, Tanzania;c1968.  ax,246p.  aHelm, Franz C.