Several changes and additions in the Pages Lane Theatre's 1990-91 season have been announced.

Following several months of negotiations, the rights have been secured to two additional productions, causing the theater to revise its original season lineup.The two new productions added to the season are "Papa Married a Mormon," first presented several years ago to sell-out crowds at Promised Valley Playhouse, and "You're A Good Man, Charlie Brown." Here's the revised calendar:

- March 8-April 22: "Papa Married a Mormon."

- April 26-June 10: "Little Women" in repertory with "The Solid Gold Cadillac." ("Little Women" will play on Mondays, Fridays and Saturdays, with "Cadillac" being presented on Tuesdays, Wednesdays and Thursdays.)

- June 14-Aug. 3: "You're A Good Man, Charlie Brown."

- Aug. 9-Sept. 30: "Fiddler on the Roof."

Season tickets, priced at $27, are now available for the five remaining shows. Admission for individual shows on Fridays and Saturdays is $8 for adults and $6 for children (under 12). Admission on Monday evenings is $6 for adults and $5 for children.

Admission for "Little Women" and "Solid Gold Cadillac" is $5 for all performances.

For reservations, call 298-1302.