1. Occurrence of hopperburn resistance and susceptibility in the potato

   • T. C. Allen
   • G. H. Rieman

   OriginalPaper Pages: 139 - 142

2. Potato culture and storage investigations in 1937 and 1938

   • E. V. Hardenburg

   OriginalPaper Pages: 143 - 150

3. Potato production problems in South America

   • John Tucker

   OriginalPaper Pages: 151 - 160

4. Sectional notes

   • Ernest Marx
   • W. B. Ward
   • John Tucker

   Announcement Pages: 160 - 168