00281nam a2200109Ia 450000500170000000800410001708200150005810000190007324500330009226000380012530000080016320260205095956.0260111s9999||||xx |||||||||||||| ||und||  a925  J231N  anewton,david e 0ajames watson & francis crick  ahyderabadbuniversity pressc1999  a130