I agree with Cynthia@SAS:  Both David Marx and Walter W. Stroup are at the Department of Statistics in the University of Nebraska at Lincoln and have contact e-mail addresses. Chapter 11 of the second edition of SAS for Mixed Models, one of whose authors is Walter W. Stroup, is devoted to spatial variability; this chapter is probably much more up to date than the 1993 paper. Another possibility is contacting the library at Kansas State to see if they have the proceedings from the conference on applied agricultural statistics where this paper was presented. ... View more

The OP may also want to look at PROC KRIGE2D.  I think all (or almost all) of the spatial forms in the macro are available in that procedure.  I have to admit that I have never used it, but looking through the documentation examples, it seems like a possible alternative. Steve Denham ... View more