 McClintock , B. ( 1931 ) . " The Order of the Genes C , Sh and <unk> in Zea Mays with Reference to a <unk> Known Point in the Chromosome " . Proceedings of the National Academy of Sciences of the United States of America 17 ( 8 ) : 485 – 491 . Bibcode : <unk> ... 17 .. <unk> doi : 10 @.@ 1073 / <unk> PMC <unk> . PMID <unk> . 
