Couple Announce April WeddingAn April wedding is being planned by Patricia Anne Lan-dahl of Buffalo, N.Y. and Richard Bergstrom, son of Mrs. i Elva S. Bergstrom, 631 N. Pine.Bergstrom met his fiance, daughter of the Edward W. Landahls, Angola, N.Y., in his work with the veterans administration hospital in Buffalo where he is on the staff of the Rehabilitation Therapy department.Miss Landahl, a graduate of Buffalo General hospital school j of nursing, is on the staff at the VA hospital.Bergstrom, a graduate of the University of Illinois, served four years with the U.S. Navy prior to accepting the position at the hospital.