Equals
https://www.m-a.org.uk/resources/Equals-24-2.pdf (page 22 to 27) beware error on page 23
https://www.m-a.org.uk/resources/Equals-24-3.pdf (page 12 to 19)
https://www.m-a.org.uk/resources/Equals-24-2.pdf (page 22 to 27) beware error on page 23
https://www.m-a.org.uk/resources/Equals-24-3.pdf (page 12 to 19)