You will need 31 x 50g balls of yarn.
From the pattern description:
A hand-knitted throw is a priceless treasure, especially this one as it is richly textured with cable patterns. Knitting it in three separate panels makes it easy to handle.
Good practice for working cables as each panel of this throw is just a straight strip with no shaping involved.
Magazine issue: 36
About the publisher:
The Art of Knitting is available as a weekly partwork magazine, published in the UK by Hachette Partworks Ltd, PO Box 77, Jarrow, NE32 3YJ. Back issues are available.