Global navigation :
Ackroyd, Neil.
Global navigation : a GPS user's guide / Neil Ackroyd and Robert Lorimer. - London ; New York : Lloyd's of London Press, c1990. - xxi, 202 p. : ill. ; 24 cm.
1850442320
Global Positioning System.
623.89 / ACK
Global navigation : a GPS user's guide / Neil Ackroyd and Robert Lorimer. - London ; New York : Lloyd's of London Press, c1990. - xxi, 202 p. : ill. ; 24 cm.
1850442320
Global Positioning System.
623.89 / ACK