The Political Graveyard: Politicians: Lamb -- State Senate years are unknown

I'm doing a bit of research. Who can tell me the years of service in the PA Senate for Michael Lamb's father, Thomas Lamb?

The Political Graveyard: Index to Politicians: Lamb: "Lamb, Thomas F. (b. 1922) — of Pennsylvania. Born in Pittsburgh, Allegheny County, Pa., October 22, 1922. Served in the U.S. Navy during World War II; member of Pennsylvania state house of representatives, 1959-66; member of Pennsylvania state senate, 1966-. Catholic. Member, Knights of Columbus. Still living as of 1971.

Lamb was the Senate majority leader in his time. When did that time end?

i ask because in the debate, showed on TV last night, Michael Diven made a false claim in his opening statement. Diven though it was more than 70 years ago since the Pittsburgh area had a member in the senate in the majority party. Thomas Lamb, PA Senator, was the majority leader in his time.

Diven is 40-years off the mark -- at least.

Diven is wrong too as there have been others in the area who have represented parts of Pittsburgh in PA's Legislature and Senate from the GOP who were much more recent than 70 years.