00471cac a22001693a 4500001001300000003000400013005001700017008004100034010001700075040001300092050002100105245005000126260006000176300002100236710002700257999001700284ltf96012222 DLC20260227111555.0040527m19191971txua          000 0 eng    altf96012222   aDLCcDLC00aHS3313.Z95bA4-Z00aMerit badge series.p[Aerodynamics--Aviation]  aNew York, N.Y. :bBoy Scouts of America,c[1919-<1971>]  av.bill.c21 cm.2 aBoy Scouts of America.  c37763d37763