TY - BOOK ID - 145415982 TI - Some relations among the blocks of symmetrical group divisible designs AU - Connor, W. S. AU - United States. PY - 1952 PB - Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, DB - UniCat KW - Combinatorial analysis. KW - Combinatorial analysis. UR - https://www.unicat.be/uniCat?func=search&query=sysid:145415982 AB - ER -