000 00299nam a2200109 4500
245 _aSymbiosis
_cWilliam Trager
100 _aTrager, William
260 _aNew York
_bVan Nostrand Reinhold
_c1970
300 _aix,100p.:ill.; 19cm.-
490 _aSelected topics in modern biology
082 _a589.1
_bTRA
999 _c27169
_d27169