A survey of New York Times articles through July 1952 brings up the following leaders. I can't link to the actual articles as they are paid items only.

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SAUCERS' INQUIRY MADE; Air Force Looks Over a Report of Eight Flying in Echelon
July 17, 1952, Thursday

Page 4, 197 words

WASHINGTON, July 16 (UP) -- The Air Force, which does not believe in "Flying Saucers" but is always willing to investigate stories of them, disclosed today that it was looking over a new report on them.

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Air Force Debunks 'Saucers' As Just 'Natural Phenomena'; Intelligence Chief Denies a Menace Exists -- 'Objects' Believed to Be Reflections, but 'Adequate' Guard Will Be Kept AIR FORCE DEBUNKS 'SAUCER' REPORTS

By AUSTIN STEVENSSpecial to THE NEW YORK TIMES.

July 30, 1952, Wednesday

Page 1, 1023 words

WASHINGTON, July 29 -- Air Force headquarters skimmed away into the broken dishware bin today the latest wave of "flying saucers." It called them "natural phenomena" and announced through high-ranking general officers that henceforth the Air Force would treat reports of the disks with "adequate but not frantic" attention.

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SAUCERS' VISIT ON COAST; Flying Objects Hover 4 Nights in Area, Californian Says
July 25, 1952, Friday

Page 19, 109 words

(No excerpt)

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Coast Guard Releases Daytime Picture of 'Objects' Over New England -- Not Reflections, Dayton Fliers Say
August 2, 1952, Saturday

Page 3, 552 words

WASHINGTON, Aug. 1 (AP) -- A mystery photograph of four blazes of light in the sky, plus a report from jet pilots on a night flight that an object they sighted was not a reflection, added new twist today to the "flying saucers" puzzle.

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60 'Saucer' Reports Fly At Air Force in 2 Weeks
By The United Press.

July 18, 1952, Friday
Page 5, 164 words

DAYTON, Ohio, July 17 -- An Air Force spokesman said today some sixty reports of flying saucers had been received during the last two weeks. He could give no reason for the sudden increase.

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NOW THEY ARE "OBJECTS"
July 29, 1952, Tuesday

Page 20, 333 words

The romanticists who are willing to believe that Mars and Venus are inhabited by people so intelligent and advanced that they have been visiting us for centuries and giving us a periodic "once over" must be highly pleased with the reported failure of jet fighter planes to intercept what, a few months ago, were called "flying saucers" but are now called "objects."

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Flying Objects Near Washington Spotted by Both Pilots and Radar; Air Force Reveals Reports of Something, Perhaps 'Saucers,' Traveling Slowly But Jumping Up and Down


July 22, 1952, Tuesday

Section: BOOKS, Page 27, 598 words

WASHINGTON, July 21 (AP) -- The Air Force disclosed tonight it had received reports of an eerie visitation by unidentified aerial objects -- perhaps a new type of "flying saucer" -- over the vicinity of the nation's Capital

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Make Positive Statement
August 2, 1952, Saturday

Page 3, 173 words

DAYTON, Ohio, Aug. 1 (AP) -- Reports by jet interceptor pilots today marked the first time pilots checking on flying saucer reports here had made such a positive statement

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