The tenth volume in New Dimensions, an annual series of science fiction anthologies, was edited by Robert Silverberg and published by Harper & Row in July 1980.
One Plus One Studio provided the typographic jacket design, starring a large “10” in numerals from Calypso. Or rather, it’s the letters I and O: the original Calypso glyph set included a set of caps (A–Z) only.
The bold spurless sans is neo-Pacifica by Headliners, which must have been released shortly before: it’s not yet listed in a 1978 catalog.