Finally got the answers :)
35 D of a D = Diagonals of a decagon (!)
37 DCS by SRB = DOUBLE CENTURIES SCORED BY SIR DONALD BRADMAN (spelling mistake on the sheet, not mine)
57 PFD in a R = Point Four Degrees in a Radian
67 M in H = 67 M in H.... Made in Heaven (Bingo Call)
94 M by P = M by P.... Masses by Palestrina (no, I've no idea either)
A little disappointed really. Thought they would be the type that are so obvious when you see the answers. Apart from the mistake on the Don Bradman one.