57' Two Books:The American Philatelist (Stamp Book) SC-AS IS(?Missing Pages??)

1957 Lot of 2 The American Philatelist (Stamp Book) SC-AS IS Books on stamp collecting Both books are deeply yellowed. 10x7 inches. Both books appear to be complete. However, per contact page, the books do not have the traditional pages numbering of 1 for first page. 1. February Issue: Volume 70 No. 5.- Per the contact page, the page numbering begins with 328 end with 400. (Missing pages????-I found this with another older pamphlet) 2. August Issue: Volume 70 No. 11-Per the contact page, the page numbering begins with 849 ends with 901. (Missing pages????-I found this with another older pamphlet I have listed.)