n-Beam lattice images. I. Experimental and computed images from W4Nb26O77 Allpress, J. G. ; Hewat, E. A. ; Moodie, A. F. ; Sanders, J. V. Abstract Publication: Acta Crystallographica Section A Pub Date: November 1972 DOI: 10.1107/S0567739472001433 Bibcode: 1972AcCrA..28..528A