Tuesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) features the newest releases by Pokey Lafarge, Durwood and Sallie Ford. Also: a newly issued live Grateful Dead performance from 1977 along with some Brother Dege Legg, Bob Dylan, Johnny Cash, Los Bravos, Eric Burdon & the Animals and more.