Soweby, L..
Vector Field Theory with Applications / - 1st ed / - London : Longman Group and Ltd.. - p.252 :
0-582-44122-6
Vector
B466 / L4S
Vector Field Theory with Applications / - 1st ed / - London : Longman Group and Ltd.. - p.252 :
0-582-44122-6
Vector
B466 / L4S