DAVIS, W. J. THE SEVENTH YEAR: INDUSTRIAL CIVILIZATION IN TRANSITION / BY W. JACKSON DAVIS.
Dyfyniad Arddull ChicagoDAVIS, WILLIAM JACKSON. THE SEVENTH YEAR: INDUSTRIAL CIVILIZATION IN TRANSITION / BY W. JACKSON DAVIS. NEW YORK: NORTON, C1979. 296 P.
Dyfyniad MLADAVIS, WILLIAM JACKSON. THE SEVENTH YEAR: INDUSTRIAL CIVILIZATION IN TRANSITION / BY W. JACKSON DAVIS.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.