%A Knutson, Lloyd V. %A Stoner, Allan K. %A Beltsville Agricultural Research Center %A Friends of Agricultural Research Beltsville, Inc. %T Biotic diversity and germplasm preservation, global imperatives : invited papers presented at a symposium held May 9-11, 1988, at the Beltsville Agricultural Research Center, Beltsville, Maryland %I Kluwer Academic Publishers %D 1989 %S Beltsville symposia in agricultural research %V 13 %U https://ci.nii.ac.jp/ncid/BA10278390