(alternate) is listed as THE Y PLUS X PUBLISHING CO., BMI.

(radio call sign) was a Mexican AM radio station which, in 1972, featured gospel music programs broadcast by Brother Henderson, broadcasting at 1090 kilocycles. No radio station was using the call sign X P R S in 1968, but the station appears to be identical to X E R B, which used the same frequency in 1968 and was situated at Rosarito, Baja California Norte, Mexico.

(label) was active in 1963 at Chicago, Illinois.
X L P featured: Mac Johnson.

(label) was based at Memphis, Tennessee in about 1964, its issue #901 being a reissue from either EAST SIDE #1004, or from the Ford label. X – L RECORDS may have been operated by Stan Kesler. Its other issues included rock ‘n’ roll sides by Sam the Sham; and by Billy Wood and the Skylighters.
X – L RECORDS featured: BINGHAMPTON BLUES BOYS (sic: #901).

(radio call sign) appears to be the call sign used in 1968 for the AM radio station referred to as X E R A in the liner notes to (British) KRAZY KAT LP #KK 7426. It was an AM radio station technically located at Ciudad Acuña, Coahuila, Mexico, although in fact operating largely across the Rio Grande at Del Rio, Texas. Wolfman Jack was featured by the station. Radio station X E R F was operating in 1968, at Ciudad Acuna, Coahuila, Mexico.

(radio call sign) was an AM radio station located in northwestern Mexico, which broadcast blues and gospel music to the southwest United States. In 1968 it was still operating at Rosarito, near Tijuana, Baja California Norte, Mexico. By 1972 it appears to have been renamed X P R S.

(radio call sign) was referred to in the liner notes of (British) KRAZY KAT LP #KK 7426, and may refer to a radio station at Villa Acuña, Coahuila, Mexico, which was active between 1935 and 1939, opposite Del Rio, Texas: Tony Russell, facebook group The Real Blues Forum, 25 October 2019. Alternatively it may be an earlier call sign for AM radio station X E R F.

(radio call sign) was an AM radio station operating in 1935 near the Mexican border, which featured bluesman Tom Shaw. In 1968 a station having the same call sign was based at Tijuana, Baja California Norte, Mexico.
LB 9/26

(radio call sign) was a Mexican AM radio station operating in 1935, when it featured blue yodeler Jesse Rodgers (cousin of Jimmie). Although bluesman Tom Shaw recalled it as being at Tijuana, Baja California Norte, an AM station having the same call sign was based at Aguascalientes, Aguascalientes, Mexico in 1968.
LB 9/26

label was a subsidiary of R C A VICTOR, active during 1953-1955. Issue #0142 was released by 25 June 1955. By 10 September 1955, R C A VICTOR announced that it intended “X” to be renamed VIK. It had become Vik by the time of issue #X-0227. The #LX-3000 series (later #LVA-3009 series) commencing 1953, and mainly prewar jazz) comprised 10-inch 33 rpm LPs. The #EVA-3000 series (and also #EVA-6 onwards) comprised 7-inch 45 rpm EPs.
“X” featured: “country and urban blues” (Ida Mae Mack and Bessie Tucker: LP #LVA-3016); Peppermint Harris (#0142); Louis Jordan; “The Jug Bands” (LP #LVA-3009,); “Kings of the Blues” (LP #LVA-3032); Ida Mae Mack (#EVA-7); Memphis Jug Band (#EVA-3009); Mickey ; & Sylvia; Bessie Tucker (#EVA-8); The Washboard Rhythm Kings (LP #LVA-3021); Jimmy Yancey (LP #LX-3000; #EVA-3000).
Artists not of blues interest included: Henry “Red” Allen (LP #LVA-3033); Eddie Condon (LP #LX-3005); Johnny Dodds (LP #LX-3006); Earl Hines (LP #LVA-3023); Tommy Ladnier (LP #LVA-3027); Jimmie Lunceford (LP #LX-3002); McKinney’s Cotton Pickers (LP #LVA-3031)’ Mezz Mezzrow (LP #LVA-3015, #EVA-6); The Missourians (LP #LVA-3020, #EVA-15); Jelly Roll Morton (LP #LX-3008, LP #LVA-3028); Bennie Moten (LP #LX-3004; LP #LVA-3025); King Oliver (#EVA11); The Original Dixieland Jazz Band (LP #LX-3007); Ben Pollack (LP #LX-3003); Susan Reed (LP #LVA-3019, #EVA-29); Rex Stewart (LP #LX-3001); Pick Temple (LP #LVA-3022); Fats Waller (LP #LVA-3035).