Persons on Vessels Naval, merchant marine, and other vessels were enumerated with the cooperation of the Navy ... Packages of the special enumeration forms for crews of vessels (P4) with letters of instructions were mailed directly to ... It sent special enumeration forms (P5) to each location, and it entered the number of forms and date of mailing on the Transmittal and Receipt Record (Form 17P-15).
|Title||:||The 1950 Censuses, how They Were Taken|
|Author||:||United States. Bureau of the Census|