Contains documents:
1. Potted History of Ecoso 1967 to 1979 (orginally written by Maurie Crow for Ecoso 21) 
2. Irregular/TRG, Ecoso/Crow Collection (written by Ruth Crow 1998) 
3. Maurie Crow and the Town Planning Research Group (written Ruth Crow 1998) 
4. Review of Subscribers to Ecoso (written by Ruth Crow mid 1990's)