Improving school custodial service, by N. E. Viles,... [Foreword by Henry F. Alves.]

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Improving school custodial service, by N. E. Viles,... [Foreword by Henry F. Alves.]

Nelson Eric Viles, Henry F. Alves, Etats-Unis

Autre Première publication : 1949

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Improving school custodial service, by N. E. Viles,... [Foreword by Henry F. Alves.]

Improving school custodial service, by N. E. Viles,... [Foreword by Henry F. Alves.]

U.S. government printing office ((Washington,)) · 1949