Vital signs, 1997-1998Lester Russell Brown, Christopher Flavin, Hal Kane · First published 1997Open the Tome
Vital Signs 1996Lester Russell Brown, Christopher Flavin, Hal Kane · First published 1996Open the Tome
Vital Signs, 1994Lester Russell Brown, Hal Kane, David Malin Roodman · First published 1994Open the Tome
Vital signs 1993Lester Russell Brown, Ed Ayres, Linda Starke, Hal Kane · First published 1993Open the Tome
