<div class="description">
<dl><dd>Includes bibliographical references and index</dd>
<dd>Microfilm</dd>
<dd>NLM copy, inscription, S.H. Woodridge, Mass. Inst. Technology, Boston, on inserted leaf at front</dd>
<dd>Condition reviewed</dd>
<dd>digitized</dd></dl><br>Subjects: Ventilation; Heating</div>
<div class="fn value">
Billings, John S. (John Shaw), 1838-1913</div>
Internet Archive identifier