Comparison of an Eight-Hour Plant and a Ten-Hour Plant. Report ... on an investigation by P.S. Florence, etc. (Studies in Industrial Physiology.) [WorldCat Entities]

"Comparison of an eight-hour plant and a ten-hour plant. Report by Josephine Goldmark,... and Mary D. Hopkins,... investigation by Philip Sargent Florence,... Prepared by direction of the Surgeon general"
"Comparison of an Eight-Hour Plant and a Ten-Hour Plant. Report ... on an investigation by P.S. Florence, etc. (Studies in Industrial Physiology.)"@en
"Comparison of an eight-hour plant and a ten-hour plant"@en
"Comparison of an eight-hour plant and a ten-hour plant"

Comparison of an Eight-Hour Plant and a Ten-Hour Plant. Report ... on an investigation by P.S. Florence, etc. (Studies in Industrial Physiology.)