ROCKPORT, ME.- For the first time in more than 25 years, the Center for Maine Contemporary Art will present, in effect, three solo exhibitions by three generations of well-established and distinguished artists with strong Maine connections: Will Barnet, Yvonne Jacquette, and Dozier Bell. The exhibitions open Thursday, August 5, and will continue through Saturday, September 25. Will Barnet’s exhibition, Master Printmaker: Selections from Five Decades, combines widely known representational prints of family and personal memories with a series of very rare, less well-known abstract prints from the 1950s and ’60s. The exhibition offers a strong cross-section of Barnet’s interest in printmaking, which reaches back to his early days in the 1930s at the Boston Museum School and Art Students League in New York. Barnet, now 99 years old, taught at the Art Students League for four decades. His teaching there