1930

February
PROJECTION ENGINEERING magazine side cover February 1930

March
PROJECTION ENGINEERING magazine side cover March 1930

April
PROJECTION ENGINEERING magazine side cover April 1930

May
PROJECTION ENGINEERING magazine side cover May 1930

June
PROJECTION ENGINEERING magazine side cover June 1930

July
PROJECTION ENGINEERING magazine side cover July 1930

August
PROJECTION ENGINEERING magazine side cover August 1930

September
PROJECTION ENGINEERING magazine side cover September 1930

October
PROJECTION ENGINEERING magazine side cover October 1930

November
PROJECTION ENGINEERING magazine side cover November 1930