Witness observed a disc-shaped object flying low, estimated at
500 feet. Object was 35-40 feet in diameter,
15-18 feet thick, grayish white in color, with steam or
vapor streaming from the rear. Object made a complete turn
in a small valley and then moved on at at hight rate of speed in a
westerly direction.
Page ID (PID) : NARA-PBB90-875
Collection : NARA Blue Book
Roll Description : Project Blue
Book Roll 90
Frames 875 - 877