00386nam a22001217a 4500008004100000040005500041080001500096245007300111260004200184300000900226650000900235653002000244230425b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a528.71bJ2  aPhotogrammetric mapping from air photographs: bA simple explanation  aLondon: bILIFFE and Sons Ltd, c1952  a54p.  aMaps  aPhotogrammetric