Text ( visual ) : unmediated Gottlieb sets and duality in homotopy theory / I.G. Halbhavi and K. Varadarajan. -- Calgary, Alberta : University of Calgary, Department of Mathematics, Statistics and Computing Science , 1974. -- 22 leaves ; 28 cm. -- (Research paper ; no. 218). -- Includes bibliographical references (leaf 22). -- (BB29557091) ; https://ci.nii.ac.jp/ncid/BB29557091 Author Heading(s): Halbhavi, I. G. ; Varadarajan, Kalathoor