Reagan Hails Republicans' Unity; Carter's Aides Defend Jobs Policy; G.O.P. Retains Brock as Chief Reagan Hails Republican Unity; Brock Is Re-elected as Chairman Reagan-Bush Appearance Plea by Mayor Young Democrats Attack Challenger Campaign Pace Quickening Carter Aides, Assailing Reagan, Insist President Has Frozen Some Hiring Rebuttal on Hiring Freeze Many Work 'Indirectly'
DETROIT, July 18--Ronald Reagan today spent his first full day of the general election campaign hailing Republican unity, which he will need for the next 110 days if he is to win the White House.


