00295nam a2200109Ia 450000500170000000800410001708200160005810000170007424500480009126000380013930000080017720260224040907.0260224s9999||||xx |||||||||||||| ||und||  a631.522 WEL  aWelsh, J.R.  0aFundamentals of plant genetics and breeding  aNew York: John Wiley & Sonsc1981  a290