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| Unit 1 ... Williams II, C. K ... Depicts the following; Plan; State ... 1991 |
| Unit 1 ... Williams II, C. K ... Depicts the following; Plan; State ... 1996 |
| Unit 1, room 3 ... Williams II, C. K ... Depicts the following; Plan; State ... 1993 |
| Unit 1, Trenches keyed ... N/A ... Depicts the following; Plan; State ... 1991 |
| Unit 1, under ... Williams II, C. K ... Depicts the following; Plan; State ... 1993 |
| Unit 2 ... Williams II, C. K ... Depicts the following; Plan; State ... 1990 |
| Unit 2 ... Williams II, C. K ... Depicts the following; Plan; State ... 1993 |
| Unit 2 ... N/A ... Depicts the following; Plan; State ... N/A |
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