How many songs are in the album "The Dub Master" by King Tubby?

There are a total of 20 songs in "The Dub Master".

When was the album "The Dub Master" by King Tubby released?

"The Dub Master" was released on January 1, 2011.

#	Track	Artist	Key	Camelot	BPM
1	King Tubby Meets The Rockers Uptown	Augustus Pablo	D♭ Major	3B	133
2	Invasion	Jackie Edwards, The Aggrovators	B Major	1B	79
3	No Conscience - Dub	Dennis Brown, The Soul Syndicate	B Minor	10A	136
4	A Ruffer Version	Johnny Clarke, The Aggrovators	F♯ Minor	11A	79
5	Buckshot Dub	Rupie Edwards	A♭ Major	4B	144
6	A Better Version	King Tubby	A♭ Minor	1A	76
7	Youth Man	Niney The Observer, King Tubby	F♯ Major	2B	145
8	Jah Love Rockers Dub	The Aggrovators, Tommy McCook	A Minor	8A	145
9	Stalag 17	The Techniques All Stars	F Major	7B	165
10	I Trim The Barber	King Tubby, The Aggrovators	B♭ Major	6B	79
11	Three Times Three	King Tubby	E Major	12B	132
12	Dancing Roots	Cornell Campbell	F Major	7B	166
13	The Big Rip Off	Augustus Pablo, King Tubby	A Major	11B	143
14	A Harder Version	Johnny Clarke, The Aggrovators	D♭ Minor	12A	151
15	Don't Think About Me (I'm Alright) Version	King Tubby, Mafia Allstars	B Minor	10A	138
16	New Style	Niney The Observer	B Minor	10A	138
17	Channel One Feel It	Leroy Smart, The Aggrovators	B Minor	10A	135
18	Dub Organiser	Dillinger	C Major	8B	130
19	Kingston Dub Town	King Tubby, Lord Creator, Clancy Eccles All Stars	B♭ Major	6B	115
20	African World Wide	Tommy McCook, The Aggrovators	F♯ Minor	11A	125