3 : ▁Grace ▁B orgen icht ▁Gallery , ▁Inc ., ▁New ▁York ▁City ▁▁ 1 9 5 6 : ▁American ▁Associ ated ▁Art ists , ▁New ▁York ▁City ▁▁ 1 9 5 7 , ▁ 1 9 5 8 , ▁ 1 9 6 1 , ▁ 1 9 6 2 , ▁ 1 9 6 4 : ▁Po index ter ▁Gallery , ▁New ▁York ▁City ▁▁ 1 9 5 9 : ▁Felix ▁Land au ▁Gallery ▁Los ▁Angeles ▁County , ▁California ▁▁ 1 9 6 0 , 1 9 6 1 , ▁ 1 9 6 3 , ▁ 1 9 6 5 : ▁Sem ia ▁H uber ▁Gallery , ▁Zürich , ▁Switzerland ▁▁ 1 9 6 2 : ▁Anderson ▁Meyer ▁Gallery , ▁Paris ; ▁Fe ing arten ▁Gallery , ▁Chicago , ▁Illinois ▁▁ 1 9 6 1 , ▁ 1 9 6 2 , ▁ 1 9 6 4 , ▁ 1 9 7 0 : ▁Pic ad illy ▁Gallery , ▁London , ▁United ▁Kingdom ▁▁ 1 9 6 5 , ▁ 1 9 6 6 , ▁( 6 7 : ▁Ger tr ude ▁Kas le ▁Gallery , ▁Detroit , ▁Michigan ▁▁ 1 9 6 6 . ▁ 1 9 6 7 , ▁ 1 9 7 2 , ▁ 1 9 7 3 , ▁ 1 9 7 5 , ▁ 1 9 8 4 , ▁ 1 9 9 6 : ▁Ela ine ▁B enson ▁Gallery , ▁Bridge ham pton , ▁New ▁York ▁▁ 1 9 7 7 , ▁