The first major exhibition in almost 20 years of works by Albert Bierstadt has opened at the Brooklyn Museum, where it will be on show through May 5.

"Albert Bierstadt: Art & Enterprise" consists of 74 of the 19th-century American landscape artist's works, including many of his dramatic scenes of the American West. The exhibition is a retrospective of works from all stages of his career, with a selection of his "plein air" oil sketches. It was organized by the Brooklyn Museum in association with the National Gallery of Art, Washington, D.C.The exhibition is sponsored by Philip Morris, with additional funds provided by the National Endowment for the Humanities, the National Endowment for the Arts, federal agencies, the New York State Council on the Arts, and Mr. and Mrs. Wilbur L. Ross, Jr.

After its showing here, the exhibition will be seen at the M.H. de Young Memorial Museum, San Francisco, June 8-Sept. 1, and at the National Gallery of Art, Nov. 3-Feb. 17, 1992.