TY - BOOK AU - AU - de Bokx, J. A. TI - Viruses of patatoes and seed-patato production SN - 9022003582 U1 - 632.38:633.491 D287V PY - 1972/// CY - Wageningen PB - Centre for Agricultural Publishing and Documentation KW - Viruses of patatoes KW - Seed-patato production ER -