International undergrounds  \\
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====== European O Titles ======

  * [[Obras Completas Crumb 1|Obras Completas Crumb 1: Mis problemas con las mujeres]] (La Cúpula, 6th: 2008) (Spanish Underground)
  * [[Obras Completas Crumb 2|Obras Completas Crumb 2]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 3|Obras Completas Crumb 3]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 4|Obras Completas Crumb 4: Mode o'Day]] (La Cúpula, 3rd: 2007) (Spanish Underground)
  * [[Obras Completas Crumb 5|Obras Completas Crumb 5: Mr. Natural, Los misterios]] (La Cúpula, ?th print: June 2005) 68 pages (Spanish Underground)
  * [[Obras Completas Crumb 6|Obras Completas Crumb 6]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 7|Obras Completas Crumb 7]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 8|Obras Completas Crumb 8]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 9|Obras Completas Crumb 9]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 10|Obras Completas Crumb 10: Conoce a tu enemigo]] (La Cúpula 2002) (Spanish Underground)
  * [[Obras Completas Crumb 11|Obras Completas Crumb 11: El desquiciado mundo de los Crumbtoons]] (La Cúpula, Dec. 23, 2004) 5,70€, 68 pages, B&W (Spanish Underground)
  * [[Obras Completas Crumb 12|Obras Completas Crumb 12]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 13|Obras Completas Crumb 13]] (La Cúpula) (Spanish Underground)
  * [[Obras Completas Crumb 14|Obras Completas Crumb 14: ¡Chicas, chicas, chicas!]] (La Cúpula 2007) (Spanish Underground)
  * [[Obras Completas Crumb 15|Obras Completas Crumb 15: Las reflexiones de Tio Bob]] (La Cúpula 2007) (Spanish Underground)
  * [[Ogoth and Ugly Boot]] (Chris Welch - Cozmic Comics/H. Bunch Associates 1973) (British Underground)
  * [[Oktobriana]] (Brumm Comix - 1972) (German Underground)
  * [[Omia kuvia|Omia kuvia / Robert Crumb]] (Like 1989) (Finnish Underground)
  * [[OM 10]] Home Made Comix - Nederlandse Editie (Arcanum) (Netherland Underground)
  * [[Onnellinen maailmanloppu]] (Seppo Seppälä, Seppo Lindqvist) (Finnish Underground)\\
  * [[On the Scene]] - Comics - Kritik - Alles drinn!!! (without publisher - 1973?) (German Underground)