Business law/30 : R. Robert Rosenberg [and] Joseph G. Bonnice. a 30-hour unit applying business law to office, marketing, health, home economics, trade and technical operations / Rosenberg, R. Robert (Reuben Robert), 1900- Bonnice, Joseph G. joint author. Commercial law United States. KF889.3 .R67 347.7 ROB Rev. ed. published as: Business law/30 / Joseph G. Bonnice, R. Robert Rosenberg. 3rd ed. c1982. New York : Gregg Division, McGraw-Hill; 1971. 1971. 1976 Text iv, 220 p. eng United States.