00693cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040004800111042001200159050001600171100004700187245006400234260004100298300005800339504004100397650002200438999001500460agr26001334 DLC20260227110946.0780814s1926    enkab    b    000 0 eng c  aagr26001334   a(OCoLC)4139757  aU.S. Dept. of Agr. LibrarycOAkdOCoLCdDLC  apremarc00aQL698b.T481 aThomson, Arthur Landsborough,cSir,d1890-10aProblems of bird-migration,cby A. Landsborough Thomson ...  a[London]bH.F. & G. Witherby,c1926.  a3 p. l., ix-xv, 350 p.billus. (maps) diagrs.c23 cm.  a"References" at end of each chapter. 0aBirdsxMigration.  c9043d9043