Harry H. Laughlin
CALCULATING ANCESTRAL INFLUENCE IN MAN: A MATHEMATICAL MEASURE OF THE FACTS OF BISEXUAL HEREDITY
Genetics 1920 5: 435–458
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Shelley R. Safir
GENETIC AND CYTOLOGICAL EXAMINATION OF THE PHENOMENA OF PRIMARY NON-DISJUNCTION IN DROSOPHILA MELANOGASTER
Genetics 1920 5: 459–487
[PDF]  

A. H. Sturtevant
GENETIC STUDIES ON DROSOPHILA SIMULANS. I. INTRODUCTION. HYBRIDS WITH DROSOPHILA MELANOGASTER
Genetics 1920 5: 488–500
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