00299nam a2200109 a 450000500170000002000150001708200160003210000230004824500490007126000480012030000210016820251203091534.0  a0691073341  a111.1,bgil  aGill, Mary, Louise  aAristotle on substance: the paradox of unity  aPrinceton: Princeton University pressc1989  axi,284p.c23 cm.