00297nam a2200109 a 450000500170000002000150001708200200003210000230005224500580007526000350013330000190016820251203091512.0  a0123384605  a516.36,bD, hel  aHelgason, Sigurdur  aDifferrntial geometry,lie groups and symmetric spaces  aNew YorkbAcademic Pressc1978  axvi,634p, 22cm