The famous pop group Crosby, Stills and Nash was in town this weekend, and while the musicians performed a bit, that wasn't the reason they came. They were all here for Stephen Stills' marriage to Pamela Ann Jordan, a former Washingtonian turned international model. Jordan, who graduated from Maret School in Northwest Washington, is the daughter of Eastern Airlines pilot Samuel T. Jordan and Vanessa Jordan. She met Stills at a party in Milan.

The wedding was Saturday in the Georgetown Presbyterian Church, with a reception at the International Club. Both David Crosby and Graham Nash were part of the wedding party. Among the 450 guests were Rep. Joseph Kennedy, Robert Kennedy Jr., Rep. Mel Levine, former congressman Toby Moffett, former Eagles guitarist Joe Walsh, former Arizona governor Bruce Babbitt and former president Jimmy Carter's sons Chip and Jeff.

Out and About Summit footnote: Max Kampelman, the U.S. chief arms negotiator, will have something to talk about next week when he flies out to the Twin Cities to receive an honorary doctor of humane letters degree from the University of Minnesota. The 67-year-old negotiator, who was in the thick of the U.S.-Soviet missile reduction agreement, has a master's degree from the university and once taught there ...

There have been a lot of troubles for former president Richard M. Nixon's planned presidential library and museum, but no one could have predicted a problem with a little old lady. After a nine-year search marked by numerous hassles and delays, Nixon's home town of Yorba Linda, Calif., was chosen as the site for the library. But construction may again be delayed because it will require the demolition of the home of a 93-year-old widow who doesn't want to move. The woman, Edith Eichler, knew Nixon as a boy and supported him for president. She said, "Why should I have to move into some crowded, dinky retirement place away from my family and friends? Do you think Richard Nixon would want his mother to move?" If Eichler can be persuaded to move, construction on the 3,000-square-foot structure will begin late next year ...

Hospital Report: Sen. Quentin Burdick was admitted to St. Luke's Hospital in Fargo, N.D., Monday after falling on ice and hitting his head. The 79-year-old Democrat, who has been in the Senate 27 years, was boarding a charter plane when he fell and hit the back of his head. He is listed in satisfactory condition and is resting comfortably ...

When William Greider reported in Atlantic magazine in 1981 that David Stockman, then director of the Office of Management and Budget, believed that the president's budget was a disaster, many said that Stockman felt he had been double-crossed by Greider. President Reagan wasn't too happy with Stockman and called him to the White House for the now famous "woodshed" reprimand. Stockman, now a partner at Solomon Bros. in New York, apparently holds no animosity for Greider, now a Rolling Stone magazine national editor and the author of a new book, "Secrets of the Temple: How the Federal Reserve Runs the Country." Stockman has written a supportive book jacket publicity blurb that reads in part, "I expect this book to shake up Washington and probably Wall Street." But then, Stockman undoubtedly will expect Greider to return the favor for his next book ...