00388nam a22001337a 4500008004100000040005500041080001800096100002000114245004700134260003700181300001200218650001200230653001200242230531b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a615.779bK7.1  aParyski, Edwin   aAntibiotics origin, nature and properties   aLondon: bPergamon Press, c1967  a1144p.   aNature   aOrigin