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Shadows of Yog-Sothoth: A Global Campaign to Save Mankind
  • PDF
  • English
  • Year: 2004
  • Author: Sandy Petersen
Guia De Campo De Sandy Petersen De Criaturas De Las Tierras Del Sueño
  • PDF
  • Spanish
  • Author: Petersen Sandy
Shadows of Yog-Sothoth: A Global Campaign to Save Mankind
  • PDF
  • English
  • Year: 2004
  • Author: Sandy Petersen
1990's Handbook: Modern Background for Call of Cthulhu
  • PDF
  • English
  • Year: 1995
  • Author: Gregory Rucka, Sandy Petersen
Infant and toddler development and responsive program planning
  • PDF
  • English
  • Year: 2014
  • Author: Petersen, Sandy; Wittmer, Donna S.
S. Petersen’s Field Guide to Lovecraftian Horrors: A Field Observer’s Handbook of Preternatural Entities and Beings from Beyond The Wall of Sleep
  • PDF
  • English
  • Year: 2015
  • Author: Sandy Petersen, Mike Mason, Lynn Willis
Call of Cthulhu: Quick-Start Rules
  • PDF
  • English
  • Year: 2013
  • Author: Sandy Petersen; Paul Fricker; Mike Mason; Lynn Willis
RuneQuest: Glorantha Bestiary
  • PDF
  • English
  • Year: 2018
  • Author: Greg Stafford, Jeff Richard, Jason Durall, Sandy Petersen
Call of Cthulhu Investigator Handbook 7th Edition
  • PDF
  • English
  • Year: 2015
  • Author: Sandy Petersen, Mike Mason, Keith Herber, Paul Fricker, Lynn Willis
Solo Contra el Wendigo - La Llamada de Cthulhu
  • PDF
  • Spanish
  • Year: 1989
  • Author: Glenn Rahman, Greg Stafford, Dan Ray, Ken Rolston, David Ray, Sandy Petersen
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