(1) Existence as a calendar unknown to author but listed by Earl Bailey, Director of Product Planning and Development for the Brown and Bigelow Company. Letter to Marion Sweeney, 1969.	
(2) Ludwig reports 1946; Sweeney reports 1950; Bailey reports 1946
(3) Ludwig reports 1947
(4) Reported by Sweeney
(5) Sweeney reports 1947
(6) Sweeney reports 1948
(7) Sweeney reports 1949
(8) Reported as calendar by Knox
(9) Sweeney reports 1946