Magnets /
MacKeehan, Louis Williams, 1887-.
Magnets / Louis W. McKeehan. - Princeton : D. Van Nostrand Company, 1967. - vi, 152 p. : ill. ; 20 cm.
Magnets.
Magnets / Louis W. McKeehan. - Princeton : D. Van Nostrand Company, 1967. - vi, 152 p. : ill. ; 20 cm.
Magnets.
