Sheldon became a pro ­ fessor at Roose ­ velt University in 1956 and eventually became the chairman of the physics department.
He was eventually promoted and became the chairman of the physics department. Sheldon became a pro ­ fessor at Roose ­ velt University in 1956.
Sheldon became a pro ­ fessor at Roose ­ velt University in 1956. He was eventually promoted and became the chairman of the physics department.
Sheldon became a pro ­ fessor at Roose ­ velt University in 1956. He was eventually promoted and became the chairman of the physics department.