THIS EPISODE (original air date 04/20/2007):

PZ0673.50 From the Vault: Rachel Carson and Silent Spring MORE INFO

ORIGINAL SOURCE RECORDINGS:

BB0430 Rachel Carson: A Memorial Appreciation MORE INFO

BB2007 Changing America / Upton Sinclair MORE INFO

BB3147 Cesar Chavez at City College MORE INFO

IZ0493.08 Talkin’ Union: An Interview with Delores Huerta MORE INFO

BB4086 Ecology Fair at Provo Park MORE INFO

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