Millman, Peter M..
This Universe of Space / - 1st ed / - London E.C.4 : Routledge & Kegan Paul Ltd.. - p.117 :
Mathematics
B9 / K3;1
This Universe of Space / - 1st ed / - London E.C.4 : Routledge & Kegan Paul Ltd.. - p.117 :
Mathematics
B9 / K3;1