K.H.A. - Footballers

1950s
Footballers
K.H.A.
Unknown number

These small cards are very rare and first came to light in Football Card Collectors Magazine no. 31. The only thing printed on the back is the words 'Free with K.H.A.'. I've no idea what K.H.A. related to. 19 subjects are listed here, do you know of any others? Just poor photocopies for the illustrations.
I would be interested in purchasing the Cardiff City cards in this collection.
UPDATE (01-05-2017 13:57):  Much better images, scans provided by Bob Thomas.

Ardron (Notts Forest) 
Bell (Tranmere Rovers)
Burden (Leeds United)
J. Charles (Leeds United)
Chisholm (Sunderland)
Corfied (Bolton Wanderers)
Deans (Notts County)
Dews (Middlesbrough)
Duquemin (Tottenham Hotspur)
Graham (Lincoln City)
Graver (Lincoln City)
Heydon (Liverpool)
Howells (Cardiff City) 
Kirton (Stoke City)
Montgomery (Cardiff City) 
O’Farrell (West Ham United)
Pye (Wolvers)
Sillett (Southampton)
Taylor (Fulham)