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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
Call of Cthulhu: Horror Roleplaying in the Worlds of H.P. Lovecraft (5.6.1 Edition)
  • PDF
  • English
  • Year: 2000
  • Author: Sandy Petersen, Lynn Willis
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
Petersen's Field Guide to Cthulhu Monsters (Call of Cthulhu)
  • PDF
  • English
  • Year: 1988
  • Author: Sandy Petersen, Tom Sullivan, Lynn Willis
Vikings - RuneQuest
  • PDF
  • English
  • Year: 1985
  • Author: Sandy Petersen, Ken Rolston, Greg Stafford
Call of Cthulhu: Quick-Start Rules
  • PDF
  • English
  • Year: 2013
  • Author: Sandy Petersen; Paul Fricker; Mike Mason; Lynn Willis
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