00693cam a22002051 4500 1/17644 010717s1969 enk eng 027173132X 18169 DLC GR-PeUP 517 HA Hammer, Preston C. Advances in mathematical systems theory/ edited by Preston C. Hammer. University Park, Pennsylvania State University Press [c1969] 174 p. illus. 24 cm. Includes bibliographies. System analysis. Systems engineering. INST UNIPILB MAIN 20040709 517 HA 00136440 00136440 LOAN 0 1 /webopac/covers/01/18169_027173132X.jpg