BB SIGHTINGS - 1948 - BY MONTH

NARA-PBB1-15 - Jan-Feb-March Sightings
NARA-PBB1-16 - April-May-June Sightings
NARA-PBB1-17 - July-August Sightings
NARA-PBB1-18 - September Sightings
NARA-PBB1-19 - Nov - Dec Sightings