The basic rules were the same then as they are now. There is typically a rule or two changed each year...sometimes more, sometimes less. I'm thinking the Designated Hitter was added to the AL rules during this time period, which was a significant new rule, but most new rules or rule changes are minor.
Rules for Radicals was created in 1971.
Rafferty's Rules ended in 1990.
Baseball - 1971 VG was released on: USA: 1971
Potsworth and Co- - 1990 When Bubba Rules 1-7 was released on: USA: 13 October 1990
Go on line to MLB.com and search for rules, or google baseball rules.
Great Performances - 1971 The Rules of the Game 3-15 was released on: USA: 30 April 1975
Jose Romero - Australian rules footballer - was born in 1971.
The cast of This Week in Baseball 1990 - 1990 includes: Mel Allen as Narrator Cecil Fielder as Baseball Player Cecil Fielder Nolan Ryan as Baseball Pitcher Nolan Ryan
don't cheat and that's all the rules
Vantive was created in 1990.
Tiny Toon Adventures - 1990 Mr- Popular's Rules of Cool 1-48 was released on: USA: 10 December 1990
many baseball rules have changed over the years. this includes new rules such as no steroids in baseball and rule changes (atone time it was 7 ball for a walk not 4)