To use the above oscillator you will need a low voltage supply, which you can either derive from the 30-60 rail or supply some other way.
You can always just use a transistor multivibrator; have a look at the attached schematic and timing diagram.
You will note that the transistors are labelled 2n2222 & 2n3906; you will have to use transistors that can operator at 60V, e.g. 2n2222 --> bc546, 2n3906 --> bc556. Q6 will have to be 1A capable (higher current capability recommended), e.g. maybe TIP111.